ML20209A933
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\..v..../ DEC 3 0 B80 MEMORANDUM FOR: L. Shao, Acting Director Division of Reactor Safety Research FROM: Thomas E. Murley, Director Division of Safety Technology .
SUPJECT: JAERI MARK II CONTAIU"ENT TEST PROGRAM The JAERI CRT/I' ark 11 program has been of value to NRR in providing information useful in the resolution of the A-8 Unresolved Safety Issue on l'. ark II Containments. However, there are several significant deficiencies in this program. The test deficiencies include problems with the instrumentation and the desirability of conducting modal analyses of the test facility.
He are requesting that research provide assistance to the JAERI program to resolve these deficiencies. Ultimately these efforts should prove beneficial to the NRC. The problems with the JAERI tests are not of such a magnitude that they will significantly impact resolution of the Mark II A-8 generic review program. However, they can play an important role in determining if further load refinements are justified for specific
{ plants in the future. It is very likely that individual Mark II plants will propose refinements to the generic loads in the future thereby requiring a detailed understanding of the pool dynamic steam condensation '
phenomena. In addition, these deficiencies should be addressed if the results of these tests are to be used in conjunction with the development of advanced pool dynamic computer codes.
- The primary problem with the instrumentation relates to the use of cavity versus flush mounted transducers. It is generally recognized that there are problems in interpreting data from these transducers (See attachedJAERItripreport). JAERI is running into difficulty in resolving In addition, these problems due to budget limitations in their program.
it is difficult for them to acquire flush mounted transducers from suppliers in a time frame consistent with their testing schedule.
Recent discussions we have had with Dr. McCauley of LLL lead us to believe that Livermore could provide JAERI with valuable assistance. We believe this can be done within the current scope and budget of their NRC containment research contract No. 6371-90. Livermore has a number of flush mounted pressure transducers left over from the LLL 1/5 scale Mark I tests. These transducers are the property of NRC. A few of these spare transducers have been loaned to Taiwan Power Company to assist them in inplant SRV pool dynamic tests in their Kuoshing #1 plant. We are recommending that Livermore assist JAERI by providing them with help installing flush mounted pressure transducers in the CRT facility. A sketch and table of recommended transducer locations is attached.
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L. Shao It would also be of considerable value to help JAERI in conducting instrumented, hammer tests on the CRT facility to identify the dominant facility modes. We previously identified shortcomings in the JAERI efforts to accomplish this. An NRC program such as the EG&G hammer tests, currently underway in the Taiwan power Kuoshing plant, could provide valuable information about the CRT facility.
- E urge the office of research to provide JAERI with assistance in the above areas. The JfERI Mark II program is nearing completion (1982) after 5 years of planning and testing. Up to this point we have received
. considerable data from JAERI at essentially no cost to the United States.
It would be unfortunate if these tests were completed and the facility dismantled without resolving the above questions.
My staff is available to discuss this request with your people, should there be any questions.
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Thomas E. Murle ,-0 rector C- Division of Safety Technology Attachments: '
As stated cc: F. Schroeder K. Kniel
- P. Norian C. Anderson L. Tong S. Fabic G. Knighton W. Butler T. Lee
! E. McCauley (Livermore)
J. Lehner (BNL) l l
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