ML19341B335
| ML19341B335 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 01/14/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Borgmann E CINCINNATI GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8101300751 | |
| Download: ML19341B335 (3) | |
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NUCLEAR REGULATORY COMMISSION W
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Occket No. 50-358 8
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Fr. Earl A. Bergmann Mlu Vice President - Encineering Cincinnati Gas & Electric Company N
M P. O. Box 960 Cincinnati, Ohio 45201
Dear Fr. Borgmann:
SUEJECT:
TMI TASK ACTION ITEM I.G.1 SPECIAL LOW PC'iER TEST PROGRM: FOR By letter dated October 31, 1980, we sent you a copy of NUREG-0737,
" Clarification of TMI Action Plan Requirements." Enclosure 2 of EUREG-0737 constitutes a compilation of those items that have been specifically approved by the Ccemission for implementation as operating license requirements.
The purpcse of this letter is to provide additicnal guidance with regard to TMI Task Action Plan I.G.1 as it applies to BWR OL applications. The basic require-reents for a special low pcwer test program were provided in NUREG-0694 (referenced as being issued 6/26/80 in Enclosure 2 to NUREG-0737).
MJREG-0694 requires applicants to " define and connit to a special icw power testing program approved by NRC to be conducted at pcwer levels no greater than 5 percent for the pc-,oses of providing meaningful technical infer: nation beycnd that obtained in tne normal startup test program and to provide supplemental training".
A low power test program similar to the one developed by TVA.for Sequoyah and and consisting of demonstrations of simulated decay heat removal under degraded plant conditions has been approved for PWR applicants.
The " degraded conditions" to which PWRs are being subjected include varicus combinations of natural circulation and reduced saturation margin operations with actual and simulated
- a. c. power losses, steam generator isolations and boration and cooldown.
In view of the fact that natural cirec12 ion and reduced saturation margin conditions are routine to SWR operaticas, the PWR programs cannot be used for BWRs in their entirety.
It would be possible to use the standby baron system to perform a boron mixing test similar to one of the PWR tests, however, the experience gained would not justify the cleanup problem. We consider one of the PWR tests, a simulated loss of all a. c. power, to be feasible and c,De that should be performed on EWRs. The objective of this test is to familiarize.
operators with plant response and determine plant limitations in a blackout.
To perform such a test a real or simulated scurce of decay heat is necessary.
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Mr. Earl A. Eoremann
~ JM 141981 (In the PWR prograns decay heat is simulated by input of fission heat or coolant pump heat.)
To use deoy heat it will be necessary to defer the test until decay heat is available (as is permitted for one of the PWR tests in which reactivity control would be difficult).
If ycu decide to perform this simulated loss of a. c. rcwer test with decay heat, you should perform this test within the first 1500 WD/T core exposure and inrediately following 7 days of operation at 80 percent rated pcwer or acove.
If you decide to use a simulated source of decay heat (such as steam from an external sourca or actual reactor power), you shoulii perform this test during the initial test program.
You should cccmit to the special low power test program fcr your facility Detailed test procedures and safety analyses shculd be submitted now.
for cur review four weeks prior to licensing.
In additicn to the above, you shcula also cerait to augmented cperator training by carticipation in the pre-cp and startup test programs. Guidelines for the latter will be provided by the BWR Owners' Group. The format for ycur test procedures should be consistent with Regulatory Guide 1.68.
The results of the test program should be documented as part of the " Start-up Test Report" (see Regulatory Guide 1.i6).
Taking the above actions will constitute a, basis for your satisfactory compliance with Item I.G.I.
Sincerely, Eb'N Robert L. Tedesco Assistant Director for Licensing Division of Licensing cc: See next page
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Mr. Earl A. Borgmann Vice President - Engineering Cincinnati Gas & Electric Company JAn 14 39; P. O. Box 960 Cincinnati, Ohio 45201 cc: Troy B. Conner, Jr., Esq.
Leah S. Kosik, Esq.
Conner, Moore & Corber 3454 Cornell Place 1747 Pennsylvania Avenue, N.W.
Cincinnati, Ohio 45220 Wasnington, D.C.
20006 W. Peter Heile, Esc.
Mr. William J. Moran General Counsel Assistant City Solicitor Room 214, City Hall Cincinnati Gas & Electric Company Cincinnati, Ohio 4.220 P. O. Box 960 Cincinnati, Ohio 45201 John D. Woliver. Esc.
Clermont County Comunity Council Mr. William G. Porter, Jr.
Box 181 Porter, Stanley, Arthur Batavia, Ohio 45103 and Platt 37 West Broad Street firs. Mary Reder Columbus, Ohio 43215 Box 270, Rt. 2 Mr. James D. Flynn, Manager California, Kentucky 41007 Licensing Environmental Affairs Andrew B. Dennison, Esq.
Cincinnati Gas & Electric Company 200 Main Street P. O. Box 960 Batavia, Ohio 45103 Cincinnati, Ohio 45201 David Martin, Esq.
Robert A. Jones, Esq.
Office of the Attorney General Prnsecuting Attorney of Clemont County, Ohio 209 St. Clair Street 154 ilain Street First Floor Batavia, Ohio 45103 Frankfort, Kentucky 40601 Resident Inspector /Zimer-Dr. Frank F. Hooper RFD 1. P. O. Box 2021 School of Natural Resourc?s U. S. Route 52 l
University of Michigan Moscow, Ohio 45153 Ann Arbor, Michigan 48109
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Charles Bechhoefer, Esq., Chairman Atomic Safety & Licensing Board Panel U.S. Nuclear Regulatory Comission Washington, D.C.
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Mr..Glenn 0. Bright Atomic Safety & Licensing Board Panel i
U.S. Nuclear Regulatory Comission Washington, D.C.
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