ML17299A580
| ML17299A580 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/27/1985 |
| From: | Licitra E Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8509060225 | |
| Download: ML17299A580 (36) | |
Text
Docket Nos.:
50-528 50-529 50-530 APPLICANT:
Arizona Public Service Company FACILITY:
Palo Verde, Units 1, 2, and 3
SUBJECT:
SUMMARY
OF MEETING TO DISCUSS DEVELOPMENT OF A TEMPERATURE DEPENDENT SHUTDOWN MARGIN A meeting was held in Bethesda, Maryland on June 27, 1985 with representatives of the applicant.
The purpose of the meeting was to hold initial discussions with the staff on the development of a temperature dependent shutdown margin for the Palo Verde Technical Specifications.
The meeting attendees are listed on Enclosure 1,
and the viewgraphs presented at the meeting are included as Enclosure 2.
The meeting is summarized as follows.
~Summar The applicant informed the staff that it is currently developing a proposed modification to the Palo Verde Technical Specifications (Items 3/4.1.1.1 and 3/4. 1. 1.2) to establish a shutdown margin that is temperature dependent in lieu of being mode dependent.
The proposal is tentatively targeted for submittal in September 1985.
The applicant stated that if the modification is approved by the staff, it would increase plant availability by reducing the amount of boration and deboration required during a plant shutdown.
The applicant requested staff feedback regarding the proposal.
The staff indicated that it is not aware of any considerations which would preclude the use of a temperature dependent shutdown margin, but the staff acceptability cannot be determined until after it has had a chance to review the actual proposal to be submitted in September 1985.
Original signed ptj E.A. L)cHra E. A. Licitra, Project Manager Licensing Branch No.
3 Division of Licensing
Enclosures:
- 1. Meeting Attendees
- 2. Viewgraphs DISTRIBUTION 5'~
NRC PDR Local PDR PRC System NSIC LBk'3 Reading
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- Attorney, OELD GWKnighton ELicitra JLee THaung MLey L
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Mr. E.
E.
Van Brunt, Jr.
Arizona Nuclear Power Project Pa'lo Verde CC:
Arthur C. Gehr, Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. James H. Flenner, Chief Counsel Arizona Corporation Cormission
'200 West Washington Phoenix, Arizona 85007 Charles R. Kocher, Esq. Assistant Council James A. Boeletto, Esq.
Southern California Edison Company P. 0.
Box 800
- Rosemead, California 91770 Mr. Hark Ginsberg Energy Director Office of Economic Planning and Development 1700 West Washington - 5th Floor
- Phoenix, Arizona 85007 Mr. Wayne Shirley Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Mr. Roy Zimmerman U.S. Nuclear Regulatory Commission P. 0.
Box 239 Arlington, Arizona 85322 Ms. Patricia Lee Hourihan 6413 S. 26th Street Phoenix, Arizona 85040 Regional Administrator, Region V
U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Kenneth Berlin, Esq.
Winston 5 Strawn Suite 500 2550 M Street, NW Washington, DC 20037 Ms. Lynne Bernabei Government Accountability Project of the Institute for Policy Studies 1901 Que Street, NW Washington, DC 20009 Ms. Jill Horrison 522 E. Colgate Tempi, Arizona 85238 Hr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.
7910 Woodmont Avenue Suite 1310
- Bethesda, Maryland 20814 Mr.
Ron Rayner P. 0.
Box 1509
- Goodyear, AZ 85338
~ 0 4
Enclosure 1
Tem erature De endent Shutdown Mar in MEETING ATTENDEES (JUNE 27, 1985)
NAME Manny Licitra Bruce Duncil Joe Rezendes Gerald Sowers Steve Frost Tim Collier Daniel Fieno Larry Phillips Margaret Chatterton Marilyn Ley Walter Brooks Howard Richings Marvin Dunenfeld Earl Schulz AFFILIATION NRC/DL/LB3
'SCE C-E APS APS C-E NRC NRC/DSI/CPB NRC/DSI/CPB NRC/DL/LB3 NRC/DSI/CPB NRC/DSI/CPB NRC/DS I/CPB C-E
PALO VERDE UNITS 1..
2 AND 3 DEVELOPf'jENT AND APPROVAL OF A TEMPERATURE DEPENDENT SHUTDPAN iNRGIf'! TECH SPEC PRESENTATION TO THE NRC JUI'JE 27.
1985
4
ImRODuCT-IOr<
PRESENT TECH SPEC
SUMMARY
PROPOSED TECH SPEC SLINNARY EXPECTED BENEFIT EVENTS COI'JS IDERED
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TO INCREASE PLANT AVAILABILITYBY REDUCING THE ANOUNT OF BORATION AND DEBORATION REQUIRED DURING A PLANT SHUTDOWN, THIS REQUIRES,NODIFICATION OF TECH SPECS 3/4.1,1,1 AND 3/4,1,1,2 REGARDING SHUTDOWN NARGIN,-
SCHEDULE REQUIRES N
R C FEEDBACK TODAY AS TO THE ACCEPTABILITY OF THE PROPOSED
- CHANGES,
HORATIO R QUIR ER OLD NEH 210 TcoLD 570 THE Lcg RESULTS IN A REDUCTION Ih THE REsTART TIrlE QF-10
- HoURS,
L'l I
(
CALCULATION OF SHUTDOWN MARGIN SIIUTDQN< NARGIII = /PD +
XD + ITD + I'IR + TRW + BN /
PD =
POWER DEFECT XD = XENON DEFECT ITD =
ISOTHERMAL TEMPERATURE DEFECT WR = WITHDRAWN ROD WORTH TRW = TOTAL ROD WORTH BW =
BORON WORTH
R SENT SHUTDOWN MARGIN II A SP FI AT Of'ES IS TCOLD
>210'O SHUTDOWN NARG IN 6K..
SHUTDO'4'N NARGIN
PRESENT TECH SPECS 3/4.1.1,1, AND 3/4 1,1,2 210 COLD LEG TEMPEfITURE, 'F 570
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NEM TECH SPEC TMO CATEGORIES OF BBAS REQUIRE A TMO PART TECH SPEC I,
RESTRICTIONS ON SHUTDOMN NRCIN 2.
RESTRICTIONS ON REFT'URRENT TECH SPEC DEFINITIONS OF SHUTDOMN NRCIN AND OPERATIONAL MODES MILL NOT BE CHANGED
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f,
PROPOSED SHUTDOWN NARGIN TECHNICAL SPECIFICATION IS NODE=1 oR NODE=2 YES NO SHUTDOWN f1ARGIN 6X ALL RODS ON BOTTON?
NO YES NEW TENP DEP, SHUTDOWN NARGIN CURVE K
Ch TC SHUTDOWN NARGIN 1%
KEFF ~
99 ASSUffING NOST REACTIVE INSERTED ROD IS.'FJECTED
EXPECTED RESULTS ARI 100 200
. 300 400 500 COLD LEG TENPERATURE, 'F NOTE:
. ALL VALUES ARE PRELIi'lIllARY
EXPECTED RESULTS ANY ROD OUT 6,0X (500~F) j.00 200 300 400 COLD LEG TEMPERATURE, '
500 600 NOTE:
ALL VALUES ARE PREI IMINARY
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EXPECTED RESULTS ANY ROD OUT KEFF (',99 CALCULATED ASSUMING THE HIGHEST 4'ORTH INSERTED ROD IS EJECTED,
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BORON SAVIi"lGS USING THE KEFF f'lETHOD CEA GROUPS 1 2 3 4 5 B
TOP OF CORE C-E REACTOR CORE ASSUNED ARI CONFIGURATION CALCULATION OF SHUTDOMN MARGI<i:
SHUTDOMN NARGIfl =
PD + XD + ITD +
BW FOR 212'F THE SHUTDOWN NARGIN CAN BE REDUCED TO APPROXIf'lATELY 1X FROf'l 6%,
THE MORTH OF THE HOST REACTIVE ROD IS If1PLICIT IN THE CALCULATION OF SHUTDOMN NARGIN, FOR SHUTDOMN NARGIN = 1X, KEFF = 0,94 ASSURES SUBCRITICALITY Ial THE EVENT OF A CEA EJECTION SAVINGS IN BORON:
5X x 80 PPNIX = 400 PPN
EVENTS CONSIDERED FOR THE TECH SPEC CHANGE'IMITING EVENTS WITH A POTENTIAL FOR A RETURN TO CRITICALITY 1.
STEAM LINE BREAK 2,
CEA GROUP WITHDRAWAL 3,
CEA EJECTION BORON DILUTION 5,
STARTUP OF INACTIVE RCP
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t f
G E5XI N
RO (S)
OUT CEA EJECTION KEFF KEFF STARTUP OF AN INACTIVE RCP KEFF KEFF STEAM LIl'lE BREAK KEFF SHUTDOWN MARGIN BORON D ILUTION
. SHUTDOWN MARGIN SHUTDOWN MARGIN CEA WITHDRAWAL REACTOR TRIP DROPS ROD OR BREAKERS OPEN:
iNOT A CREDIBLE EVENT REACTOR TRIP DROPS ROD
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C IT RI 0
N, TIO OF T Sl',
STEAN LINE BREAK:
NO RETURN TO POWER 2,
CEA EJECTION:
NO CRITICAL CONFIGURATION (KEFF 1,0)
CEA GROUP WITHDRAWAL:
NO SDN REQUIRED,
~
HIGH LOG POWER TRIP WILL PROVIDE PROTECTION 4,
BOROfi DILUTION:
15 NINUTES UNTIL LOSS OF SHUTDOWN NARGIH 5,
STARTUP OF INACTIVE RCP:
KEFF ~ li0
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