« ПредыдущаяПродолжить »
tetuuuinii th* fidelity of tome aspect* of oar computatiaaal mnrirli mM
'l«-[/<-f,'Ji«i/ '/<; how international nuclear threat environments evolve.
Ttii! <|iii-:,t.i.,n of whether three years, one year, or three months is an adequs^ lend lime for conducting an underground nuclear test may be important as it relate to mutter* of safety, confidence, or perhaps development associated with the nodea.physicM package, of a warhead. The time required to carry out a test will also depec: cni.K'iilly on whether the problem that led to the need to test is one that could affect it large percentage of the stockpile. However, because of Sandia's success in developing mi alternative methodology for hostile effects certification, urgent need for tat inti will no longer be the crucial issue it once was for ensuring performance in hostile environments for the systems for which we are accountable.
EXERCISING THE WEAPON DESIGN PROCESS
Much of the supporting science for stockpile stewardship can be exercised in laboratory investigations, but. design skills can only be proved on real products. System life extension projects serve two purposes: They modernize older systems that need refurbishment., and they exercise the competence of the weapons engineering skills that we require for the future. However, exploratory work on advanced concepts will also lie necessary to ensure that our design skills are sufficiently challenged for evolving needs in the nation's nuclear forces.
The nuclear weapons complex has not been engaged in a new system design since IIW'J. During the past, ten years, we have exercised our competencies with a few modification programs, exploratory projects, and subsystem enhancements. Assuming that a new warhead design will not be authorized for the foreseeable future, full system life extension programs are the only effective vehicle for exercising the design process.
We depend on engineers and scientist who are knowledgeable, experienced, and seasoned in their judgment for making stockpile stewardship succeed. Our confidence in their ability to perform their responsibilities is gained through seeing them succeed with large, complicated, and challenging projects that require them to think through the integration of the many elements of a system into a demount cable product Therefore, it is important that the NNSA laboratories continue to offer weapon design work in the form of life extension projects or similar programs on a permanent basis.
1 must emphasue that the nuclear weapons program requires an intimate relationship between the laboratories, where designs are created, and the production Slant* that manufacture the designs. Sandia design engineers work closely with pronctton engineers tit the NNSA production agencies and contractors where < nent* tire manufactured and war-heads are assembled or disassembled. The I toiie* aiv also the appropriate authorities for certifying production plant r_.
The new generation of engineers and scientists who will perform design and production engineering in the decades ahead will not have had the benefit of experience tin tUU-av«W weapon development programs. We must find other ways to those people in the future The hie extension projects approved bv the Na Weapons Council for the WW Trident warhead, the B61 bomb, and die W?0 cr^se uus&ile warhead are important major projects for exercising the design process mi the designer*
STOCKPILE ANNVAL CERTIFICATION PROCESS
Assessment Activities at Sandia
Sandia's responsibility for stockpile annual certification comprises the nonnuclear subsystems that control the operation of nuclear warhead. Our confidence in the stockpile has always been anchored in the community of experienced engineers and scientists who are expert in the disciplines of stockpile stewardship. Confidence is also maintained through exhaustive non nuclear tests, a long history of fielded weapons and their data, a careful preventive maintenance and replacement program, chemical analyses, computer modeling, and joint or independent reviews of our work.
We test and model the performance of nonnuclear components and systems in a variety of normal, abnormal, and hostile operational environments. We certify weapon performance under normal operating environments, and we verify that components and systems will retain adequate functionality after exposure to hostile environments. Most normal operational environments of concern for nonnuclear components and systems can be simulated without nuclear explosive tests.
Under the Defense Programs Enhanced Surveillance Campaign, we develop tools and models to measure, qualify, and predict the effects of aging on weapon materials and components and to understand how those effects impact weapon safety and reliability. One enhanced surveillance project uncovered unexpected behavior in desiccants designed to maintain a noncorrosive internal atmosphere in the warhead. Our new understanding of desiccant behavior is guiding the formulation of new desiccants for weapons refurbished under stockpile life extension programs. Another surveillance project discovered problems with newly procured material for replacement o-rings, which we were able to intercept.
Two years ago Sandia introduced non destructive, acoustic laboratory testing of strong-links, a major safety component of nuclear warheads, into the core surveillance program. Last year we added a second development from the Enhanced Surveillance Campaign into this core surveillance test equipment that allows us to evaluate the electrical current-carrying capacity of these safety devices. Both of these new tests have allowed us to better predict the useful lifetime of this critical component and enhance our replacement planning strategy.
DoD and DOE/NNSA annually conduct joint flight tests on warheads of each type in the enduring stockpile. Historically, flight tests have uncovered approximately 22 percent of the defects discovered in surveillance databases.
I would like to address the two reports issued by the DOE Inspector General this past year on the surveillance program—one on the testing backlog for flight and laboratory tests, and the other on the significant findings investigation process. The backlog situation was noted by the Foste Panel,2 and I nave referred to this problem in previous years' statements to this committee. While I do not believe that the situation is as dire as some might have suggested, action was necessary on the part of NNSA and the laboratories to improve performance. We are working with the Navy and Air Force to ensure the availability of samples and flight-test vehicles to complete the desired levels of testing. After a hiatus in Air Force cruise missile testing due to missile problems and infrastructure renewal, I am pleased to report that we have begun flight testing again with two successful advanced cruise missile tests, although it will take us several years to catch up with our desired level of testing.
The Foster Report emphasizes that surveillance, assessment, and certification processes for the stockpile should be as rigorous and probing as possible.3 I am in full agreement that the laboratories should be challenged to improve their processes and adopt the most advanced tools and effective assessment methodologies available. Complacency in this mission space would be inexcusable.
The Foster Report recommends the use of "red teams" within each laboratory and strongly endorses the inter-laboratory peer review function.4 Sandia has practiced red teaming and peer review successfully for decades. Our Surety Assessment Center is a full-time red team that is organizationally independent of the weapon design groups and which reports directly to the laboratory's executive management. In addition, we engage an independent advisory panel with external members to oversee the activities of the Surety Assessment Center and make recommendations directly to executive management on a semiannual basis. Thus, not only do we have a red team, but we also have a red team for the red team!
Peer review at Sandia follows the same model as the Livermore/Los Alamos competitive arrangement. We have a laboratory in New Mexico that supports development programs assigned to Los Alamos, and we have another laboratory in California adjacent to Lawrence Livermore that supports Livermore weapon programs. The example of peer review with the B61 described in the Foster Report* is not a new concept, but is basically how the arrangement works in practice. The California designers peer-review the work of the designers in New Mexico, and vice versa. I assure you, it is not a collegial interaction. It is a formal process that is often quite contentious. Within the past few weeks, I have received peer review reports iron groups in California and New Mexico that confirm again to me that Sandia's peer review process is vigorous and robust.
Comments on Section 3144
The Defense Authorization Bill at Section 3144 would mandate laboratory "red teams" to challenge internal laboratory assessments and to perform inter-laboratory peer reviews. Actually, red teaming and peer reviews have Deen standard practices between the nuclear weapon laboratories since at least 1956, when the concept of two competing laboratory clusters was fully implemented.
However, the current language of Section 3144 is faulty in many respects. For example, it would require Sandia to peer-review the assessments of the nuclear design laboratories and vice versa. This fails the first requirement of "peer review"—that the participants indeed be peers! Sandia is not competent to peer-review the nuclear explosive systems of Livermore and Los Alamos; and conversely, Livermore and Los Alamos do not have the competence to peer-review the technologies nor the complexities of Sandia's nonnuclear components. But the longstanding arrangement whereby the California design cluster and the New Mexico design cluster peer-review each other avoids that problem, and has proved to be an effective practice.
I am also troubled by the provision requiring that the President and Congress receive each certification letter and report from each laboratory director and the commander of Strategic Command, including the findings and recommendations of all their red teams. Currently, the laboratories' Annual Assessment Reports and directors' letters are included as background information in the package accompanying the joint certification memorandum from the Secretaries of Energy and Defense. But I do not believe that it would be appropriate, as a routine practice, to forward all red-team findings to the President and Congress. Red-team issues are usually very arcane and highly technical. In the vast majority of cases they can—and should— be resolved at the level of the laboratory director.
However, I have always maintained that a minority report from a laboratory director regarding the certification of any warhead should De communicated to Congress ana the President as part of any safeguards process associated with a nuclear test ban or moratorium. The Nuclear Weapons Council (a very senior council of Defense and Energy that was created by Congress to oversee nuclear stockpile issues) requires that the laboratories' Annual Assessment Reports be "forwarded unaltered to the Secretaries," so I do not see this as a worrisome issue.
The Secretaries of Energy and Defense have a responsibility to integrate the laboratory directors' findings and provide the President with the "bottom line," and I believe that any president would require that of them. Currently, the Nuclear Weapons Council is tasked to perform that integration function and prepares the Nuclear Stockpile Certification Memorandum (to the President) for signature by the two secretaries.
It is surprising that Section 3144 makes no mention of any role for the Nuclear Weapons Council. Under current law6 the Nuclear Weapons Council has broad responsibility for oversight of stockpile programs. Some of the requirements that Section 3144 would place on the laboratory directors (i.e., in their reports accompanying certification) are already assigned to the Nuclear Weapons Council by statute. I would be uncomfortable, for example, evaluating the relative merits of various nuclear weapons for a particular military mission, as would be required of me in my annual certification report as currently outlined in Section 3144. However, this (and other responsibilities) are adequately and appropriately discharged by the Nuclear Weapons Council.
I credit the Foster Panel for focusing attention on the importance of the annual certification process, which was originally established by President Clinton in 1995 by directive. The process was also spelled out in the Resolution of Ratification that accompanied the Comprehensive Nuclear Test-Ban Treaty to the Senate. However, because that resolution failed in the Senate vote, that document today has no formal status. I might add that with the failure of the CTBT ratification, there also is no procedural certainty by which the need for a nuclear test would be communicated within either the Executive or the Legislative branches of the U.S. government. Thus, it may perhaps be time to establish annual certification as a statutory requirement with responsibilities carefully defined in law. However, by moving too quickly with the proposed Section 3144 at this time, we may create, at best, a partial fix that will introduce some unintended consequences.
My recommendation would be that the Congress task the Executive branch to ■work through the Nuclear Weapons Council to perform an end-to-end systems analysis of the annual assessment and certification process and to recommend one or more legislative options. The Nuclear Weapons Council is the cognizant body invested by Congress with authority over stockpile policy matters, and it forms the junction between the NNSA and the Department of Defense. It also possesses current operational knowledge of stockpile management and stewardship. Certainly the Foster Report's recommendations should be important considerations in their deliberations.
I have expressed my concern before this committee (and its counterpart in the Senate) in hearings going back to 1997 over the matter of balance in the Stockpile Stewardship Program. The essential question has always been how to balance the resources needed to support and maintain the deployed stockpile, while also creating new laboratory facilities to partially substitute for the loss of nuclear testing. I believe the Foster Panel is correct with its assessment that:
The weapons program must be transformed from a decade focused on the scientific building blocks of stockpile stewardship to a focus on meeting DoD's stockpile requirements and restoring the infrastructure necessary to sustain and refurbish the stockpile.7
Several studies8 have concluded that the infrastructure of the nuclear weapons complex has eroded significantly and needs refurbishment. After a decade of aggressive investment in large scientific facilities for science-based stockpile stewardship, it has now become urgent to assess that part of the infrastructure of the nuclear weapons complex that directly supports the stockpile maintenance mission and to make appropriate changes and investments. Specifically, the engineering design and production capabilities of the complex need to be addressed with a prudent plan for realignment and refurbishment. The life extension programs for the W76, W80, and B61 depend on this.
At Sandia, the Microsystems and Engineering Sciences Applications (MESA) complex is crucial to our ability to design, develop, and, if necessary, produce microelectronics and integrated microsystems to support a certifiable stockpile for the future. We are being very careful to phase the development of that facility in a way that it can provide the needed support for various stockpile refurbishments in a timely manner, so that from the start its capabilities will be supportive of the stockpile lifeextension schedule.
Like other sites across the NNSA complex, Sandia has a number of aging facilities in need of refurbishment that fall below the level of line-item construction and have been insufficiently supported by general plant projects (GPP) or other infrastructure funding programs. Infrastructure problems at this level are chronically understated and deferred, and they accumulate with the passage of years. Ultimately, this can lead to capability limitations that impair the mission.
NNSA addressed this problem through a Facilities and Infrastructure Initiative that inventoried infrastructure repair and improvement projects across the complex. Congress approved an appropriation request of $200 million in fiscal year 2002 to help bridge the gap for essential infrastructure repairs that were unfunded. However, the effort to restore the NNSA weapons complex will take many years and the total costs are not yet well defined. It will be important to assign highest priority to those facilities that are essential for the scheduled stockpile refurbishments over the next decades.
At Sandia, we identified approximately $300 million in infrastructure revitalization projects that would be carried out during the course of the next few years. The top priority items on our inventory are sufficiently urgent that failure to fund them would impact weapon program deliverables. A specific example is Sandia's Electromagnetic Test Facility. Its twenty-year-old diagnostic equipment has limited capability to support data acquisition for the development and validation of simulation codes. This modernization project will improve our capability to perform electromagnetic tests to qualify the W76 and W80 in accordance with their life extension plans.
NNSA's Facilities and Infrastructure Initiative will perform a very important service to the Defense Programs mission if it succeeds in restoring the appropriate balance in funding for infrastructure improvements that are critical to sustaining mission capabilities. As currently planned, the initiative will help the nuclear weapons complex deal with longstanding infrastructure challenges. NNSA also needs a more viable decontamination and demolition program to dispose of obsolete facilities. The program must also make a long-term commitment to major renovations