ML19289C858
| ML19289C858 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 01/15/1979 |
| From: | Stello V Office of Nuclear Reactor Regulation |
| To: | Finfrock I JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR NUDOCS 7901250317 | |
| Download: ML19289C858 (3) | |
Text
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fM UNITED STATES g
~ *g NUCLEAR REGULATORY COMMISSION g
g WASHINGTON, D. C. 20555 e
f January 15, 1979 Docket No. 50-219 Jersey Central Power & Light Company ATTN: Mr. I. R. Finfrock, Jr.
Vice President - Generation Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960 RE: 0YSTER CREEK As part of the Systematic Evaluation Program (SEP) the NRC staff is conducting a search of your docket for pertinent infomation related to the seismic design bases of your facility. We are comparing the available infomation with current seismic design criteria in an effort to assess safety margins in the areas of geologic and seismic input and structural capability of safety-related structures, systems and equipment to witt.=
stand earthquake effects.
As you know, the major NRC regulations dealing with seismic design are 10 CFR Part 50, Appendix A (General Design Criterion 2) and 10 CFR Part 1GO, Appendix A.
We recognize that both of these regulations were issued subsequent to the design of your facility. However, one of the objectives of the SEP is to cmpare the origiral design basis with current criteria.
Currently, the infomation on the docket is not sufficiently complete to adequately address the potential hazard of earthquakes, nor to detemine whether backfitting of additional seismic resistance would provide sub-stantial additional protection required for safety.
At this time, based on the docketed infomation, we expect that our safety assessment of the design bases in your FSAR and other filings will be positive in tems of actual safety margins at your facility.
However, we encourage you to closely follow our review as it progresses and to initiate any effort that you may believe necessary to confim the actual seismic safety margins of your facility. As part of our assessment, it is expected that we will require significant additional seismic design infomation not on the docket to support our seismic safety assessment. As our review indicates the need for such infoma-tion, we will infom you.
79012503/7
Jersey Central Power & Light Company January 15, 1979 We expect the major area of review to be our assessment of the significance of changes in seismic design techniques from those used for your facility and those used today. As part of the effort to satisfy this objective, we have conducted a preliminary evaluation which indicates that the major area of difference in seismic input from current criteria relates to the shape of the ground response spectra used. In this regard, the NRC staff is evaluating various site specific response spectra methodologies which may demonstrate a more realistic approach in determining seismic input thari that used in current licensing reviews. We encourage you to closely follow the progress of our work and initiate any effort you may feel is necessary to better assess the seismic safety margins of your plant.
To provide maximum assurance that the scope of any planned evaluations is appropriate, we suggest that detailed working level meetings with the NRC staff for your facility prior to the initiation of your efforts would be beneficial. Until our evaluation of site specific response spectra metho-dologies is complete, it is our intent to use current criteria design spectra (e.g., Regulatory Guide 1.60, suitably modified for inelastic be-havior) as a baseline for our initial evaluation of actual seismic safety margi ns.
The NRC staff will be contacting you periodically over the next several months to obtain information pertinent to our seismic evaluation of your plant. We expect that significant interaction with your technical staff will be required.
Sincerely, 5,
f pcgc e 10, r.,
ector Division of Operating Reactors Office of Nuclear Reactor Regulation cc:
See next page
Jersey Central Power & Light Canpany January 15, 1979 cc:
G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 GPU Service Corporation ATTN: Mr. E. G. Wallace Licensing Manager 260 Cherry Hill Road Parsippany, New Jersey 07054 Anthony Z. Roisman Natural Resources Defense Council 91715th Street, N. W.
Washington, D. C.
20005 Steven P. Russo, Esquire 248 Washington Street P. O. Box 1060 Toms River, New Jer'sey 08753 Joseph W. Ferraro, Jr., Esquire Deputy Attorney General State of New Jersey Department of Law and Public Safety 1100 Raymond Boulevard Newark, New Jersey 07012 Ocean County Library Brick Township Branch
'401 Chambers Bridge Road Brick Town, New Jersey 08723 f
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