ML16341E913
| ML16341E913 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/05/1988 |
| From: | Murley T Office of Nuclear Reactor Regulation |
| To: | Clarke R PACIFIC GAS & ELECTRIC CO. |
| References | |
| GL-87-12, GL-88-17, NUDOCS 8812220348 | |
| Download: ML16341E913 (12) | |
Text
Docket Nos.
50-275 and 50-323 f1r. Richard A. Clarke Chairman and Chief Executive Officer Pacific Gas Im Electric Company 77 Beale Street San Francisco, California 94106
Dear Mr. Clarke:
SUBJECT:
LOSS OF DECAY HEAT REMOVAL DEC.
5 1988 DISTRIBUTION:
Q~~NRC I L 1
P R
PDV r/f GKnighton HRood JLee OGC-WF1 EJordan BGrimes ACRS(10)
PDV Gray Files We have just issued Generic Letter 88-17 which addresses loss of decay heat removal (DHR) during nonpower operation.
This letter was issued because of the potential serious consequence of loss of shutdown cooling concurrent with significant core decay heat.
Further, it is our belief that the industry as a whole has not aggressively responded to resolve the concern following its identification in our earlier Generic Letter 87-12.
In particular, the industry's response to the Generic Letter 87-12 was deficient in the areas of (1) prevention of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core
- damage, and (3) control of radioactive material if a core damage accident should occur.
Generic Letter 88-17 prescribes expeditious actions which should immediately ease the concern; and parallel, but longer term, programmed enhancements which effectively address the root, cause of the problems and permit greater flexi-bilityy in operation.
As you may recall much of this activity was initiated as a result of the April 10, 1987 Loss of Decay Heat Removal event at Diablo Canyon.
We therefore, look to you to be particularly responsive to resolving these concerns.
We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.
S incere ly, orx..ii s'gned by Thomas E. Murley cc:
See next page
- See previous concurrence Thomas E. Murley, Director Office of Nuclear Reactor Regulation Office:
LA:DRSP:PDV*
PM:DRSP:PDV*
,.Surname:
JLee HRood/tg Date:
ll/03/88 11/03/88 Office:
(A):D:DRSP*
(A):ADP Surname:
GHolahan DCrutchfield Date:
ll/04/88 11/
/88 88i2220348 88i205 l
PDli ADOCK 05000275 P
PDC D:DRSP:PDV*
GKnighton 11/03/88 DDONRR JSniezek 11/
/88 (A)AD:DRSP*
MVirgilio ll/04/88
~tlONRR TMur Icy 1+~88
Docket Nos.
50-275 and 50-323 Mr. Richard A. Clarke Chairman and Chief Executive Officer Pacific Gas Im Electric Company 77 Beale Street San Francisco, California 94106
Dear Mr. Glar ke:
DISTRIBUTION:
PDV r/f HRood OGC-HF1 BGrimes PDV Gray Files NRC 8 Local PDRs GKnighton JLee EJordan ACRS(10)
SUBJECT:
LOSS OF DECA HEAT REMOVAL hie have just issued Gene <ic Letter 88-17 which addresses loss of decay heat removal (DHR) during nonp wer operation.
This letter was issued beca se of the potential serious consequence of loss of shutdown cooling concurrent ith significant core decay heat.
Further, it is our belief that the industry s
a whole has not aggressively responded to resolve the concern following 'its identification in our earlier generic Letter 87-12.
In particular, the industry's response to the Generic Letter 87-12 was deficient in the areas of (1) prbvention of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core
- damage, and (3) control of radioactive material iA,a core damage accident should occur.
Generic Letter 88-17 prescribes ex)editious actions which should immediately ease the concern; and parallel, but(longer term, programmed enhancements which effectively address the root cause of the problems and permit greater flexi-bility in operation.
As you may recall much of this activit twas initiated as a result of the April 10, 1988 Loss of Decay Heat Removal event at Diablo Canyon.
hie therefore, look to you to be particularly responsivd to resolving these concerns.
We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.
Sincerely, cc:
See next page
- See previous concurrence Thomas E. Murle
<~ Director Office of Nuclear Reactor Regulation Office:
Surname:
Date:
Office:
Surname:
Date:
LA:DRSP:PDV*
JLee 11/03/88 (A):D:DRSP*
GHolahan ll/04/88 PM:DRSP:PDV*
HRood/tg 11/03/88
(
D utchfield 11/ b /88
/ /
11(1q NRR iezek
/
/88 D:DRSP:PDV*
GKnighton 11 03 88 (A)AD:DRSP*
MVirgilio 11/04/88 RR ur1ey 1'Tf ( /88
P'
~
e ocket Nos.
50-275 and 50-323 Mr. Rich rd A. Clarke Chairman d Chief Executive Officer Pacific Ga 5 Electric Company 77 Beale Str et San Francisco, California 94106
Dear Mr. Clarke:
SUBJECT:
LOSS OF DE Y HEAT REMOVAL DISTRIBUTION:
PDV r/f HRood OGC-WF1 BGrimes PDV Gray Files NRC
& Local PDRs GKnighton JLee EJordan ACRS(10)
We have just issued Gen ric Letter 88-17 which addresses loss of decay heat removal (DHR) during nonpower operation.
This letter was issued beca se of the potential serious consequence of loss of shutdown cooling concurrent with significant core decay heat.
Further, it is our belief that the industry as~a whole has not aggressively responded to resolve the concern following it',identification in our earlier Generic Letter 87-12.
In particular, the industry 's response to the Generic Letter 87-12 was deficient in the areas of (1) preve'ntion of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core
- damage, and (3) control of radioactive material if a cope damage accident should occur.
Generic Letter 88-17 prescribes expeditious actions which should immediately ease the concern; and parallel, but longer<term, programmed enhancements which effectively address the root cause of the problems and permit greater flexi-bility in operation.
We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.
Sincerely, cc:
See next page Thomas E. Murley, Director; Office of Nuclear Reactor Regulation Office:
Surname:
Date:
P:PDY JL 11
/88 RSP:PDV d/tg 1 /
/88 D
G on 1
/88 l
(A)AD:DRSP ~b
MVirgilio 11/ f/88 Office:
Surname:
Date:
(A):DXR+
GHola an gt$Q 11/
/88 (A):ADP DCrutchfield 11/
/88 DDONRR JSniezek 11/
/88 DONRR TMurley 11/
/88
H II li 4
t[
~"
I<
El
.~g8 REMI
+~
~o*
I O
C 0
+~
~O
+)t**+
Docket Nos.
50-275 and 50-323 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 DEC 5 1988 Mr. Richard A. Clarke Chairman and Chief Executive Officer Pacific Gas 8 Electric Company 77 Beale Street San Francisco, California 94106
Dear Mr. Clarke:
SUBJECT:
LOSS OF DECAY HEAT REMOVAL We have just issued Generic Letter 88-17 which addresses loss of decay heat removal (DHR) during nonpower operation.
This letter was issued because of the potential serious consequence of loss of shutdown cooling concurrent with significant core decay heat.
Further, it is our belief that the industry as a whole has not aggressively responded to resolve the concern following its identification in our earlier Generic Letter 87-12.
In particular, the industry's response to the Generic Letter 87-12 was deficient in the areas 6f (1) prevention of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core
- damage, and (3) control of radioactive material if a core damage accident should occur.
Generic Letter 88-17 prescribes expeditious actions which should immediately ease the concern; and parallel, but longer term, programmed enhancements which effectively address the root cause of the problems and permit greater flexi-bilityy in operation.
As you may recall much of this activity was initiated as a result of the April 10, 1987 Loss of Decay Heat Removal event at Diablo Canyon.
We therefore, look to you to be particularly responsive to resolving these concerns.
We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.
Sincerely, Thomas E. Murley, Director Office of Nuclear Reactor Regulation cc:
See next page
r
Hr. Richard A. Clarke Diablo Canyon ce:
Richard F. Locke, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 McAllister Street San Francisco, Califor nia 94102 Hs. Sandra A. Silver 660 Granite Creek Road Santa Cruz, California 95065 Mr. W. C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 Managing Editor San Luis Obispo County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Mr. Leland H. Gustafson, Manager Federal Relations Pacific Gas and Electric Company 1726 H Street, N.
W.
Washington, DC 20036-4502 Dian H. Grueneich Marcia Preston Law Office of Dian M. Grueneich 380 Hayes Street, Suite 4 San Francisco, California 94102 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P.
O.
Box 369 Avi]a Beach, California 93424 Hr. Dick Blakenburg Editor 5 Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
c/o Richard F. Locke, Esq.
Pacific Gas and Electric Company Post Office Box 7442 San Francisco, California 94120 Dr. R; B. Ferguson Sierra Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Chairman San Luis Obispo County Board of Supervisors Room 270 County Government Center San Luis Obispo, California 93408 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 9th Street Sacramento, California 95814 Hs. Jacquelyn /heeler 3033 Barranca Court San Luis Obispo, California 93401
E 5, ~
h
Mr. Richard A. Clarke Diablo Canyon c
- Ms. Laurfe McDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401 Mr. Jack McGurk, Acting Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building 88 Sacramento, California 95814 Regional Administrator, Region V
U.S.
lnuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek. California 94596 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 President Calffornfa Public Utflftfes Commission California State Bufldfng 350 McAllfster Street San Francisco, Californfa 94102 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wflshfre Boulevard, Room 800 Los Angeles, California 90010 Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
V 4
ll 1
C W
~
a