ML17095A521
| ML17095A521 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 11/13/1986 |
| From: | Schierling H Office of Nuclear Reactor Regulation |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| TAC-51638, NUDOCS 8611180131 | |
| Download: ML17095A521 (86) | |
Text
November 13, 1986 Docket No. 50-275 MEMORANDUM FOR:
FROM:
SUBJECT:
Steven A. Varga, Director Project Directorate 83 Division of PWR Licensing-A Hans Schierling, Senior Project Manager Project Directorate 5'3 Division of PWR Licensing-A FORTHCOMING MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY DATE 8 TIME:
LOCATION:
PURPOSE:
November 21, 1986 8:30 a.m. - 2:30 p.m.
7920 Norfolk Ave.
NRC Offices, Room P-110
- Bethesda, Maryland Discussion of Natural Circulation, Boron Mixing, and Cooldown Test with PGIIE and Westinghouse.
PARTICIPANTS:
NRC H. Schierling C. Berlinger B. Mann J.
Wilson R. Lobel T. Marsh C. Liang E. Branagan S.
Diab K. Perkins (BNL)
J.
Joe (BNL)
PG5E B.
Lew M. Norem et al.
A. Cheung (W)
R.
Sermon (W) cc:
See next page Hans chic ling, Senior Project Manager Project Directorate 83 Division of PWR Licensing-A
Contact:
H. Schierling (301) 492-8856 PDg3 HSchi ng 11/
86 8611180131 861113 I
Mr. J.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:
Philip A. Crane, Jr.,
Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Malcolm H. Furbush Vice President
- General Counsel 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, California 94102 Mr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 More Mesa Drive Santa
- Barbara, California 93105 Ms. Elizabeth Apfelberg 1415 Cozadero San Luis Obispo, California 93401 Mr. Gordon A. Silver Ms. Sandra A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Harry M. Willis, Esq.
Seymour 5 Willis 601 California Street, Suite 2100 San Francisco, California 94108 Mr. Richard Hubbard MHB Technical Associates Suite K
1725 Hamilton Avenue San Jose, California 95125 Arthur C. Gehr, Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 NRC Resident Inspector/Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Ms.
Raye Fleming 1920 Mattie Road Shell Beach, California 93440 Joel
- Reynolds, Esq.
John R. Phillips, Esq.
Center for Law in the Public Interest 10951 West Pico Boulevard Third Floor Los Angeles, California 90064 Mr. Dick Blankenburg Editor 5 Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
Norton, Burke, Berry 5 French, P.C.
202 E. Osborn Road P. 0., Box 10569 Phoenix, Arizona 85064 Mr. W. C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 David F. Fleischaker, Esq.
P. 0.
Box 1178 Oklahoma City, Oklahoma 73101 Managing Editor San Luis Obispo County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406
l Ih
'I J
Pacific Gas
& Electric Company Diablo Canyon CC:
Dr.
R.
B. Ferguson Siera Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Mr. Le 1 and M. Gus tafson, Manager Federal Relations Pacific Gas
& Electric Company 1726 M Street, N.W.
Suite 1100 Washington, DC 20036-4502 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Michael J. Strumwasser, Esq.
Special Counsel to the Attorney General State of California 3580 Wilshire Boulevard, Suite 800 Los Angeles, California 90010 Mr. Tom Harris Sacramento Bee 21st and 0 Streets Sacramento, Cal ifornia 95814 Mr. H. Daniel Nix California Energy Commission 1516 9th Street, MS 18 Sacramento, California 95814 Lewis Shollenberger, Esq.
US Nuclear Regulatory Commission Region V
1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mrs. Jacquelyn Wheeler 2455 Leona Street San Luis Obispo, California 93400 Mr. Thomas Devine Government Accountability Project Institute for Policy Studies 1901 Que Street, NW Washington, DC 20009 Chairman San Luis Obispo County Board of Supervisors Room 220 County Courthouse Annex San Luis Obispo, California 93401 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 9th Street, Sacramento, Cal ifornia 95814 President California Public Utilities Commission California State Building 350 McAllister Street San Francisco, California 94102 Mr. Joseph
- 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building P8 Sacramento, California 95814 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Ms. Laurie McDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401
l.p 4
1
Docket File NRC PDR Local PDR NSIC PRC System PDP3 Rdg.
H. Schierling C.
Vogan ORAS H. Denton H. Thompson C. Rossi S.
Varga G. Lear B. Youngblood V. Noonan L. Rubenstein R. Ballard C. Berlinger J. Milhoan F.
Rosa V. Benaroya OGC-Bethesda J. Partlow B. Grimes E. Jordan ACRS (10)
OPA Receptionist PPAS/TOSB B. Mann J. Wilson R. Lobel T. Marsh C. Liang E.
Branagan S. Diab K. Perkins (BNL)
J.
Joe (BNL)
MEETING NOTICE DISTRIBUTION
~
~
II
~'
I!
B~(osmre. 4 November 13, 1986 Docket No. 50-275 MFMORANDUM FOR:
FROM:
SUBJECT:
Steven A. Varga, Director Project Directorate P3 Division of PWR Licensing-A Hans Schierling, Senior Project Manager Proiect Directorate
<<3 Division of PWR Licensing-R FORTHCOMING MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY DATE E( TIME:
LOCATION:
PURPOSE:
November 21, 1986 8:30 a.m. - 2:30 p.m.
7920 Norfolk Ave.
NRC Offices, Room P-110
- Bethesda, Maryland Discussion of Natural Circulation, Boron Mixing, and Cooldown Test with PGRE and Westinghouse.
PARTICIPANTS:
NRC H. Schjerling C. Berlinger B. Mann J. Wilson R. Lobel T. Marsh C. Liang E. Branagan S.
Diab K. Perkins (BNL)
J.
Joe (BNL)
PGSE B.
Lew M. Norem et al.
A. Cheuno (W)
R.
Sermon (W) cc:
See next page I
Hans chic ling, Senior Proiect Manager Project Directorate 83 Division of PWR Licensing-A
Contact:
H. Schierling (301) 492-8856 PD//3 HSchi ng 11 86
0-
ENCLOSURE 2
LIST OF PARTICIPANTS NRC/PGKE MEETING November 21, 1986 H. Schierling C. Berlinger B.
Mann R. Lobel J.
Watt J. Wilson E.
Branagen J.
Jo K. Perking M. Norem T. Libs B. Giffin A. Cheung R. Suram R. Off M. Miller P.
MoHale
REYIEM.OF NATURAL CIRCULATION, BORON MIXING AND COOLDOMN TEST AT DIABLO CANYON J-H.
JO, N-CAVLINA AND K-R-PERKINS CONTAINMENT 8 SYSTEMS INTEGRATION GROUP DEPARTMENT OF NUCLEAR ENERGY BROOKHAVEN NATIONAL lABORATORYgjgy $
ASSOCIATEO UNIVERSITIES, INC. Cl l,ll
TO ASSIST THE NRC STAF IN EVALUATING DATA AND SUPPORTING ANALYSES OBTAINED FROM THE NATURAL CIRCULATION, BORON MIXING AND COOLDOWN TEST PERFORMED AT DIABLO CANYON UNIT IN COMPLIANCE WITH THE BTP RSB 5-1 REQUIREMENT FOR A CLASS 2 PLANT-BROOKHAVEN NATIONAL lABORATORY$y gyl ASSOCIATED UNIVERSITIES, INC. Cllll
N N
OF E
E S
FOR HE TEST JJgg C
C N
EV'N/
0:00 2:58 3:22 3:28 3:43
~7;20 16:26 20:35 21:01 22:45 25:15 21:30 00:28 00:52 00:58 01:13 04'0 13:56 18:05 18:31 20:15 22:45 PLANT TRIP RCP TRIP BORON INJECTION INITIATED PORV OPEN BORON INJECTION TERNINATED COOLDOWN INITIATED (20'F/HR)
DEPRESSURIZATION INITIATED (8 PS I/HR)
RHR SYSTEN IN IATIATED CRDN FANS SECURED CRDN FANS RE-ENERGIZED END OF TEST BROOKHAVEN NATIONAL lABORATORYt) gl g ASSOCIATED UNIVERSITIES, INC.(IIII
SM A
ONOF Hf TES
~
RELAP5/MOD1
~
MINIMUM NUMBER OF NODING; ALL FOUR LOOPS COMBINED INTO A SINGLE LOOP
~
MODELING INCLUDES:
VESSEL STEAM GENERATORS PRESSURIZER UPPER HEAD BYPASS FLOW RCP SEAL INJECTION HEAT STRUCTURES (FUEL, PIPING, U-TUBE, ETC-)
PRESSURIZER HEAT LOSS RELIEF VALVES AFW ASD VALVES SEVERAL SENSITIVITY CALCULATIONS PERFORMED 20'F/HR COOLDOWN WITH RCP SEAL INJECTION M ITHOUT RCP SEAL INJECTION
--50'F/HR COOLDOWN BROOKHAVEN NATIONAL LABORATORYI)gy I ASSOCIATED UNIVERSITIES, INC.(I K.II
ASDV TSV RV AFW MFW STEAM DOME SEPARATOR PPR y GENERATOR PRESSURIZER UPPER HEAD HOT LEG UPPER DC UPPER PLENUM PUMP COLD LEG DC DC CORE UPPER PLENUM BORON INJ ECTION LOWER PLENUM Figure 3.1, Noding diagram.
<<r
TABLE 3.1 THE STEADY STATE CONDITIONS PARANETERS PLANT RELAP5/flOD1
- POWER, NW
- PRESSURE, psIA HOT LEG TEMP., 'F COLD LEG TEMP-, 'F COOLANT FLOW, LB/SEC BYPASS FLOW, Ls/sec
~p PUNP, psiA PRESSURIZER LEVEL, X STEAN PRESSURE, pslA
,. STEAN TENPERATURE, 'F STEAN FLOW, La/sFc SG HATER VOLUNE, FT BORON CONCENTRATION, ppM 3338 2252-8 608.8 36918 77-3 84.0 60.0 805-0 519-0 4039 7930 890 3338 2252-8 612-1 548.0 36678 79-6 84-6 61.7 805-0 518. 9 4035-8 7068-0 890 BROOKHAVEN NATIONAL lABORATORYgjiy g ASSOCIATED UNIVERSITIES, INC. CI KII
1)
THE TEST DENONSTRATED THAT ADEQUATE NATURAL CIRCULATION WAS ESTABLISHED AND THE PLANT WAS CAPABLE OF RENOVING THE DECAY HEAT BY THE NATURAL CIRCULATION USING ONLY SAFETY-GRADE EQUIPNENT-BROOKHAVEN NATIONALlABORATORYg) ly)
ASSOCIATED UNIVERSITIES, INC. Cllll
I
4000 O
5000 2000 O
I 000 CALCULATED BY RELAP 5/MOD I
-- PRE-TEST PREDICTION BY PG 8 E
~
iI I
I 0
2000 4000 6000 8000 10000 I2000 TIME, sec Figure 3.2 RCS flow.
'r I
gI
600
~ 500 I
~ 400 I
i
~) )
ING WITH PERFECT IVllg
HOT LEG TEMP.
COLD LEG TEMP.
- UPPER HEAD TEIYlP.
0 IOOOO 20000 TIME, sec 50000 Figure 3.4 The calculated RCS temperature (20'F/hr cooldown).
600 THYMI 500 TCoM 4
CK
+~ 400 CK LIJ M
I 300 COLIVEKCE COOLOOIIN TRIP PLANT TRIP RCPs VAIHTAIH ONE CROV F'AN OFF (OSiS HRS)
COOLOOWH USING 3 CROV F'AHS OH (lOV HRS)
ALL CROLI FANS OFF (IB35 HRS) 10% ATLIOSPHER IC THot TCelt 200 HOT STANIGY STEALI IIUPS
.IKITIATE RHR C
CLOONN USING R iR 2 I30 2400 0200 0400 0600 0800
. I000 1200 II00 I600 I800 2000 2200 CLOCKTIME (HRS)
Figure 3.6 RCS temperature for the test.
2)
ADEQUATE BORON NIXING COULD BE ACHIEVED BY THE NATURAL CIRCULATION IN THE HAIN FLOM PATH OF THE RCS USING ONLY SAFETY-GRADE EQUIPNENT-BROOKHAVEN NATIONALLABORATORY)7gy )
ASSOCIATED UNIVERSITIES, INC.(I(II
lf
E CL 500 O
O 200 O
o '00 TEST LOFT ( N PRE-TEST
)
RELAP 5
( BNL)
-- UPPER HEAD
( BNL; PERFECT MIXINGASSUMPTION)
/
////////
0 IO 20 50 40 50 60 70 80 90 TIME (min)
Figure 3.9 Boron concentration.
5)
THE EFFECT OF RELATIVELY UNBQRATED MATER ENTERING THE RCS FRON THE UPPER HEAD AND PRESSURIZER APPEARS TO BE HINI1'lAL AS LONG AS DEPRESSURIZATION IS CONDUCTED CAREFULLY TO LIHIT THE SIZE OF POSSIBLE VOID FORNATION-BROOKHAVEN NATIONAllABORATORYI)gy I ASSOCIATED UNIVERSITIES, INC.(i KII
4)
THE PRESSURE MOULD RISE AND REACH THE PORV ACTUATION PRESSURE MITHOUT LETDOMN DURING THE BORON NIXING PERIOD-BROOKMAVEN NATIONAL LABORATORYtjgy t ASSOCIATED UNIVERSITIES, INC.(I KII
2400 O 2000 400 I 600 UJ (r)
I 200 o
800 I
J P
r r
II
PRESSURE
- PRESSURIZER LEVEL I
I l
IOO 80
~O 0
60 ~
CL 40 u) 20 0
IOOOO 20000 TIME, sec 30000 40000 Figure 3.5 RCS pressure and pressurizer level (20'F/hr cooldown}.
PRESSURIZER LEVEL 6 PRESSURIZER PRESSURE vs TIME 2800
. 70 5 60 W
w 50 Ul 40 W
0 PONY PCY.SSG CYCLED 9 TIMES INITIATED I.ETDOWN PlR~
LEYEL INITIATED I.E TDOW'H (0534 WS)
~PER PRESS INITIATED LETDOWN (OISO WS)
COHHENCED KPRESS USING AUX.
SPRAY ws ws)
~PTR I.EYEL tSOLATED OPEN PORY LETDOWN PCY.456 TO (ISIG IHS)
(ISIG Iss)
KPRESSURIZE Ul O
UJ CK Ul Sfl lal 0
2400
- 2000 T 1600
- I200 800-30 20
)0
. ISOLATED ISOI.ATED LETDOWN LETDOWN (OISO ws)
(oe3I ws)
IIAIHTAIH COOLDOWH USIHG ION ATMOSPHERIC STEAII IIIIPS TRIP IIOT STAHISY INJECT 8 IT FINISH (OII3 Ws)
TRIP RCPl R INJECT DIT START (oozs ws)
(oosz ws)
COOL DOWN USIHG RW INITIATE RIB
., (leos ws) 400 2130 2400 0200 0400 0600 0800 l000 I200 l400 I600 I800 2000 220 CLOCK TIME (HRS)
Figure 3.7 Test pressure and pressurizer level.
5)
THE TEST DEMONSTRATED THAT IT COULD COOL THE MAIN RCS TO THE RHR SYSTEM INITIATION TEMPERATURE WHIlE HAINTAINING ADEQUATE SUBCOOLING DURING THE NATURAL CIRCULATION USING ONLY SAFETY-GRADE EQUIPMENT ~
BROOKHAVEN NATIONALlABORATORYgy gy g ASSOCIATED UNIVERSITIES, INC. CI Kll
700 4
600 hl Q:
I-o IIJ Q
tdI-500
TEST HOT LEG TEMP.
-SAT. TEMP. OF TEST PRESS.
CALCULATED HOT LEG TEMP.
SAT. TEMP. OF CALCULATED
+PRESS.
400 10000 20000 TlME AFTER BEG1NNING OF COOLDOWN, sec Figure 3.11 Hot leg and saturation temperature of test and cal cul ation (20'F/hr cool down).
J
600 RCS TEMPERATURE
0 LLt 500 lU
~
CL LdI-
.400 I0000 20000 TIME AFTER BEGINNING OF COOLDOVlN, sec Figure 3.12 RCS temperature and saturation temperature with 50'F/hr cool down.
5
FA S
F E
C N
THE C
0 OF THE ER HEAD DER A
R C
C A
0 COND T S
A)
HEAT RENOVAL FRON THE UPPER HEAD INTO THE CONTAINNENT ENVIRONNENT THROUGH THE CRDN AND THE UPPER HEAD DONE WHEN CRDM FANS OPERATE, B)
ANOUNT OF BYPASS INTO THE UPPER
- HEAD, C)
HEAT CONDUCTION FRON UPPER HEAD TO UPPER PLENUN THROUGH THE GUIDE TUBE STRUCTURES, D)
HEAT CONDUCTION DOWN TO THE REACTOR VESSEL THROUGH THE UPPER HEAD DONE-BROOKHAVEN NATIONAL IABORATORYI)lyI ASSOCIATED UNIVERSITIES, INC. %5ill
6)
THE TEST DEMONSTRATED THAT THE UPPER HEAD COULD BE COOLED WITHOUT VOID FORMATION WHEN THE CRDN FANS MERE IN OPERATION-BROOKHAVEN NATIONALLABORATORYlygy I ASSOCIATED UNIVERSITIES, INC.(I Kmm
I
o 700 600 500
UPPER HEAD TEMPERATURE
-- SAT-. TEMPERATURE OF RCS PRESSURE WITH 50 'F/hr COOLDOWN SAT. TEMPERATURE OF RCS PRESSURE WITH 20 F/hr COOLDOWN L
400 5
IO TIME AFTER BEGINNING OF COOLDOWN, hr l5 Figure 4.1 lhargin of subcooling in the upper head with CRDN fans in operation.
7)
THE TEST RESULTS INDICATE THAT THE UPPER HEAD COOLDOWN RATE WITHOUT THE CRDN FANS IS ABOUT O' PER HOUR-THIS IS HIGHER THAN THE CONSERVATIVE BNL CALCULATION (ACCOUNTING ONLY FOR CONDUCTION HEAT LOSS)
WHICH ESTIt'lATED A 51ININUN RATE OF 3'F/HOUR-BROOKHAVEN NATIONALlABORATORYlillI ASSOCIATED UNIVERSITIES, INC.(Itlm
STEAM GENERATOR UPPER HEAD E
A C
CORE VESSEL Figure 3.8 Bypass flow.
FLUID PATH HEAT COND PATH
I
600
"-"-NODE 1 (UPPERMOST REGION)
NODE 2
"NODE 3 NODE 4 (BOTTOM REGION) o 500 b3 l--
UJ EUI-400 300 0
IO 20 30 40 50 TIME AFTER 8EGINNING OF COOLDOWN, hr Figure 4.2 Upper head temperature when loss is due to conduction only (25'F/hr cooldown of RCS).
8)
THE RCS PRESSURE SHOULD BE NAINTAINED ABOVE 12QQ PSIA BY NEANS OF EITHER THE PRESSURIZER HEATERS (IF AVAILABLE) OR CHARGING DURING THE COOLDOMN PERIOD TO AVOID THE VOID FORNATION IN THE UPPER HEAD WHEN THE CRDN FANS WERE NOT IN OPERATION-BROQKHAYEN NATIONAI. lABORATORYgy g'l t ASSOCIATED UNIVERSITIES, INC. (1% II
f
600 h
Ot UJ I-v
~
500 h3 0\\~~ a
UPPER HEAD TEMP.
SAT. TEMP. OF RGS PRESS.
400 IO 20 30 40 50 60 TIME ATER BEGINNING OF COOLDONN, hr figure 4,3 upper head temperature and saturation temperature of pC$ pressure with 20'F/hr cooldown.
I
~
r
9)
SUFFICIENT SUPPLY OF SAFETY GRADE COOLING WATER WAS AVAILABLETO SUPPORT THE PROPOSED PLANT COOLDOWN NETHOD EVEN IF THE CRDH FANS WERE NOT AVAILABLEFOR. THE DIABLE CANYON PLANT BUT THE HORST CASE REQUIRENENTS (360,000 GALLONS) NAY HOT BE AVAILABLEAT ALL PLANTS-BROOKHAVEN NATIONALlABORATORYIjgl t ASSOCIATED UNIVERSITIES, INC. CI LII
0
D 1500 IOOO LLJI-500 50'/hr COOLDOM/N 20 Fl hr COOLDOMlN 5000 I0000 I5000 20000 25000 50000 TIME AFTER BEGINNING OF COOLDOWN, sec Figure 3.15 Accumulated cooling v~ater.
e II
'e
Sai ONLY ONE >>OTOR-ORIVEN AFM PunP WAS SUFFICIENT TO SUPPLY THE NECESSARY COOLING MATER THROUGHOUT THE TRANS IENT-BROOKHAVEN NATIONAI. IABORATORYgy gy t ASSOCIATED UNIVERSITIES, INC.(I EII
0 e
~
11)
SUFFICIENT ASD VALVE CAPACITY WAS AVAILABLETO SUPPORT THE COOLDOWN EVEN WHEN THE COOLDOWN RATE WAS 50'F/HOUR.
BROOKHAVEN NATIONAl lABORATORY)) gy g ASSOCIATED UNIVERSITIES, INC.(I KII
, ~
~O 0
80
so'cr r COOCOOWW,:
20'/hr COOLDOWN 60 40 LLI o
20 Z
0 5000 I0000 I5000 20000 TIME AFTER COOLDOWN, sec Figur e 3.14 Atmospheric steam dump valve opening.
'4
12)
THE AVAILABILITYOF THE PRESSURIZER HEATERS AND LETDOWN
- SYSTEN, WHILE NOT ESSENTIAL, WOULD AFFECT THE OPERATIONAL PROCEDURES IN A NAJOR MAY-THE STRATEGY TO REDUCE THE UPPER HEAD COOLING TINE BY INTENTIONALLYFORNING VOID NAY HOT BE DIFFICULT TO PERFORN WITHOUT PRESSURIZER HEATERS-SOl'lE PLANTS APPEAR TO HAVE THE CAPABILITY TO CONTROL VOIDING BY CHARGING AND VENTING THROUGH REACTOR VESSEL HEAD VENTS-BROOKHAVEN NATIONALLABORATORYt) gy g ASSOCIATED UNIVERSITIES, INC. (a am S
'I
15)
THE RCS PRESSURE MOULD INCREASE AND STAY HIGH, AND THE PORV t'lAY BE ACTUATED PERIODICALLY IF THE LETDOMN SYSTEN MAS NOT AVAILABLE, DUE TO THE BORON INJECTION AND THE CONTINUOUS INJECTION OF RCP SEAL FLOM.
THE OPERATION OF THE AUXILIARY PRESSURIZER SPRAYER NORNALLY REQUIRES LETDOMN TO BE IN OPERATION TO PREVENT THE POSSIBLE THERNAL STRESS ON THE CHARGING NOZZLES-BROOKHAVEN NATIONALlASORATORYgy 1'l I ASSOCIATED UNIVERSITIES, INC. C1LII
~.
'S A
10)
IT IS RECOMMENDED THAT WESTINGHOUSE PROVIDE THE DETAILS OF ITS ESTIMATION FOR THE UPPER HEAD COOLING TIME WiTHOUT THE CRDM FANS-(THE BNL ANALYSIS AND THE TEST DATA INDICATE THAT THE COOLING PERIOD SHOULD BE SUBSTANTIALLY LONGER THAN THE 8 HOURS ESTIMATED BY WESTINGHOUSE)-
BROOKHAVEN NATIONALlABORATORYg7 gy I ASSOCIATED UNIVERSITIES, INC.(IllI
n C
0 p
g
+pp*4 UNITED STATES CLEAR REGULATORY COMMISSION WASHlNGTON, D. C. 20555 December 9,
1986 50-275/323 Diablo Canyon MEMORANDUM FOR:
FROM:
SUBJECT:
The Division of determined that Chief, Document Management
- Branch, T!DC Director, Division of Rules and Records, ADM REVIEW OF UTILITY EMERGENCY PLAN DOCUMENTATION Rules and Records has reviewed the attached document and has it may now be made publicly available.
Donnie H. Grimsley, Director Division of Rules and Records Office of Administration
Attachment:
As stated
y
~