ML19343D249
| ML19343D249 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 04/24/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Borgmann E CINCINNATI GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8105040042 | |
| Download: ML19343D249 (3) | |
Text
'
AL UNITED STATES
\\
[pn ate ;*o NUCLEAR REGULATORY COMMISSION u
~
WASHINGTON, D. C. 20555 n
I
{,
p 2 4191 k....+,/
s, 6'
R
.h
/
o Cocket No.: 50-358 fB fl..h U
B 1
E APR $01981> m bhg T 3
The Cincinnati Gas & Electric Company Mr. Earl A. Borgmann ATTN:
Vice President, Engineering s
Post Office Box 960 g
Cincinnati, Ohio 45201
Dear Mr. Borgmann:
Safety Concerns Associated with Pipe Breaks in the BWR Scram
Subject:
System f.,.r representatives the NRC's Office of
" Safety On April 9,1981, we discussed with Analysis and Evaluation of Operational Data ( AE00) report entitled, The Report Concerns Associated with Pipe Break in the BWR Scram System."
k in describes a potential sequence of events which could result from a brea t with an the BWR scram discharge piping during a scram condition concurrenConcerns inability to reclose the scram outlet valves. the ability to detect and isolate i
ble ECCS equipment
. quality of the scram discharge volume pip ng, such a break, and potential water and steam degradation of availaA as a result of the break.
to remedy the potential concerns.
J ther We are presently studying these issues and recommendations to determ e
quence whether the BWR design basis accidents should be modified and as a conse The purpose appropriate actions should be taken for operating BWR plants.
evaluate of this letter is to provide to you the AEOD report so that you can its applicability to your plant and determine appropriate remedial meas d
to and to request information from you concerning your evaluation in or er C
assist in determining an appropriate course of action for the NR.
Therefore, please provide us within 45 days of your receipt of this let the following information:
A generic evaluation of the applicability of the indicated
- design, sequences of events in the REPORT to the BWR plant 1
your estimate of the probability of occurrence of such sequences, and the bases for these conclusions, A generic evaluation of the applicability of the indicated safety c6ncerns and findings in the REPORT rel 2
these conclusions, and 81050400 %
A
Mr. E. A. Borgmann - 3.
A generic evaluation of the recommendations listed in the REPORT discussing the dcgree to which the recommendations are being or have been implemented with bases why the recommendations should or should not be completely implemented on DWRs.
In addition, provide the following information within 120 days of your receipt of this letter:
1.
Provide an evaluation of the applicability of the 45 day generic evaluation to your plant. This evaluation should contain plant specific considerations related to system design, instrumentation, construction, operation, operator training, and emergency procedures for your plant.
2.
In light of the AE00 report and the 45 day generic evaluation, provide a plant specific evaluation of your facility's Scram Discharge Volume System conformance to GDC 14, GDC 35, GDC 55, 550.2(v), 50.55a (including footnote 2), and $50.46 of the Commission's regulations.
This evaluation should address which portions of the Scram Discharge Volume System are considered to be part of the reactor coolant pressure boundary, the quality group and safety class of the Scram Discharge Volume System, the codes and standards used for the design, fabrication and inservice inspection of this system, and your bases for the above classifications or groupings.
3.
Provide by analysis or reference a demonstration that a break in the Scram Discharge Volume System meets the requirements of $50.46 of the Commission's regulations, taking into account the environ-mental and flooding aspects of such a break.
Sincerely, NExs w~
Robert L. Tedesco, Assistant Director for Licensing l
Enclosure:
l As stated l
cc: See next page w/ enclosure i
ps.
~<O Mr. Earl A. Borgmann Vice President - Engineering Cincinnati Gas & Electric Company P. 0. Box 960
- Cincinnati, Ohio 45201 Troy B. Conner, Jr., Esq.
cc:
Conner, Moore & Corber Leah S. Kosik, Esq.
1747 Pennsylvania Avenue, N.W.
3454 Cornell Place Cincinnati, Ohio 45220 Washington, D.C.
20006 Mr. William J. Moran Genera 1' Counsel Assistant City Solicitor Room 214, City Hall
. Cincinnati Gas & Electric Company Cincinnati, Ohio 45220 P. O. Box 960 Cincinnati, Ohio 45201 John D. Woliver, Esq.
Mr.- William G. Porter, Jr.
Clermont County Community Council Box 181 Porter,' Stanley, Arthur and Platt Batavia, Ohio. 45103 37 West Broad-Street Mrs. Mary Reder Columbus, Ohio 43215 Box 270, Rt. 2 Mr. James 0. Flynn, Manager California, Kentucky 41007 Licensing Environmental Affairs Cincinnati Gas & Electric Company Andrew B. Dennison, Esq.
P. O. Box 960 200 Main Street Batavia, Ohio 45103 Cincinnati, Ohio 45201 David Martin, Esq.
Robert A. Jones, Esq.
Office of the Attorney General Prosecuting Attorney of Clermont 209 St. Clair Street County, Ohio First Floor 154 Main Street Batavia, Ohio 45103 Frankfort, Kentucky 40601 Dr. Frank F. Hooper Resident Inspector /Zimmer School of Natural Resources RFD 1, P. O. Box 2021 i
University of Michigan U. S. Route 52 Moscow, Ohio 45153 Ann Arbor, Michigan 48109 Mr. John Youkilis Charles Bechhoefer, Esq., Chairman Atomic Safety & Licensing Board Panel Office of The Honorable William Gradison U.S. Nuclear Regulatory Commission United States House of Representatives Washington, D. C.
20515 Washington 0.C.
20555 Mr. Glenn 0. Bright Atomic Safety & Licensing Board Panel
' U.S. Nuclear Regulatory Commission Washington, D.C.
20555
'y44 8
,p-
.-, - - -