ML17297B095
| ML17297B095 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/03/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| ANPP-19590-JMA, NUDOCS 8112170024 | |
| Download: ML17297B095 (12) | |
Text
I REGULATORY CNFORMA'T ION DISTRIBUTION SYSTEM
('R IDS)
SUBJECT:
Forwards nesponse SER Chapter 7 open item~plus Chapter 7
Confirmatory Items 1
8 5, DISTRIBUTION CODE:
BOOIS iCOPIES 'RECEIVED:LTR, ENCL f TITLE: PSAR/FSAR AMDTS and Related Correspondence
- SIZEe, AOCESSION NBR:8112170024 DOC ~ DATE: 81/12/03 NOTARIZED:
YES
'OC FACIL:STN-50-528 <<Palo Verde Nuclear Station<
Unitt 1E Arizona Publi STN"50"529 Palo Verde Nuclear Stations Uni<<t '2i Arizona Publ,i 05000529 STN-50-.530 'Palo Verde Nuclear Stations Uniit 3i Arizona Publi 05000530 AUTH ~ NAME AUTHOR AFFILIATION
,VAN BRUNTPE,E, Arizona 'Public Service Co ~
,REiCIP,NAME RECIPIENT AFFILIATION T'EDE SC0 P R y L' Assistant Director for Licensing NOTES:Standardized 'Plant.i cy.'C Grimes "Standardized 'Plant.i cy':C Grimes Standardized 'Plant.i cy':C Grimes 05000528 05000529 05000530 I
'ACTION:
INTERNALS EXTERNAL:
RECIPIENT ID CODE/NAME A/D LICENSNG LIC BR 03 L'A ELD
-IE/DEP/EPDB 35 MPA NRR/DE/EQB 13 NRR/DE/HGEB 30 NRR/DE/MTEB 17 NRR/DE/SAB 24 NRR/DHFS/MFEB40 NRR/DHFS/OLB 34 NRR/DSI/AEB 26 NRR/DS I/GPB 10 NRR/DS I/ETSB 12 NRR/DSI/PSB 19 NRR I/RSB 23 04 ACRS 41 FEMA"REP DIV 39 NRC PDR 02 NTIS
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01 IE 06 IE/DEP/EPLB 36 NRR/DE/CEB 11 NRR/DE/GB 28 NRR/DE/MEB 18 NRR/DE/QAB 21 NRR/DE/SEB 25 NRR/DHFS/LQB 32 NRR/DHFS/PTRB20 NRR/DS I/ASH 27 NRR/DS I/CSB 09 NRR/DSI/IiCSB 16 NRR/DSI/RAB 22 NRR/DST/LGB 33 BNL(AMDTS ONLY)
LPDR 03 NSIC 05
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TOTAL NUMBER OF COPIES REQUIRED:
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IWUIWa lltQ IKRIwvttllCBICK>HIPiaHW P.O. BOX 21666 PHOENIX, ARIZONA85036 December 3,
1981 Mr. R. L. Tedesco Assistant Director of Licensing Division of Licensing, Office of Nuclear Reactor Regulation U. S. Nucleai-Regulatory Commission Washington, D. C.
20555 Ngpi1,+90 JNA/Ecs 4
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<<.yl
'ubject:
Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3
Docket No's."STN-50-528/529/530
'File
" '81-'056-'026'G;1."10
Dear Mr. Tedesco:
Attached is our response to the SER Chapter 7 Open Item; plus Chapter 7
Confirmatory Items 1 and 5.
If you have any further questions, please contact me.
Very trul
- yours, E. Van Brun Jr.
APS Vice Presi ent Nuclear Projects ANPP Project Director EEVBJr/ECS/mjb Attachment cc:
J. Kerrigan (w/a)
P. Hourihan (w/a)
A. C. Gehr'(w/a)
J. Rosenthal (w/a) pool (I) 8112170024 8119)3 j1PDR
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PDR ADDCH 05000528I
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STATE OF ARIZONA
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) st COUNTY OF MARICOPA)
I, John M. Allen, represent that I am Nuclear Engineering Manager of Arizona Public Service Company, that the foregoing document has been signed by me for Edwin E. Van Brunt, Jr., Vice President Nuclear Projects, on behalf of Arizona Public Service Company with full authority so to do, that I have read such document and know its contents, and that to the best of my knowledge and belief, the statements made therein re true.
Sworn to before me this~A Q day of hn M. Allen Q
1981.
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I o ary Public My Commission expires:
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'RESPONSE 'TO 'THE 'FOLL'OWING
'CHAPTER 7
OPEN AND'CONFIRMATORY"ITEMS SER Section'.7-.2:,
~0ee 'Item:
The applicant has not responded to date to Question 222.03, Qualification of Control Systems (IE Information Notice 79'-22) and Question 222.04, Control System'Failures'.
The'taff's evaluation of the applicant's response to these questions will be discussed'n a supplement to this SER.
Bechtel'nd CE are currently engaged in a study of High Energy Line Breaks and Consequential Control System Failures to satisfy the concerns of Question'22.03.'
We are currently projecting 'completion by January 8,
1982. When'ompleted", we'will report on the'esults.
In response to CESSAR Independent Design Review open item II.30, C-E addressed NRC concerns about multiple control system failures due to malfunction or failure of shared instruments or sensors.
The consequences of the" events identified'uring this analysis were found to be bounded by the existing FSAR Chapter'5 analysis.
This analysis considered'control systems within the" scope of'CESSAR and this applies to all System 80 plants.
The'nalysis of the effects of failure of control system power supplies'must be performed on a plant specific basis.
C-E has initiated'a program to provide assurance that the FSAR Chapter 15 analysis adequately bounds the'oncerns about multiple control systems failures on PVNGS.
(Question 222.04).
Prudent engineering judgement will be used to demonstrate that the Chapter 15 analyses'ound the" consequences of control system failures resulting from failures'f common power'upplies or sensors.
The bounding Chapter 15 event for each multiple control system failure scenario will be identi-fied. If the qualitative evaluation results are unacceptable consequences, then a quantitative analysis will be performed as needed.
If results are still not acceptable,'hen some provisions to eliminate the concern would be stipulated.
This study is due to be completed by March, 1982.
We anticipate no major problems will be surfaced by these two studies.
If a concern is identified, we commit to resolving that concern.
0 APS RESPONSE TO THE FOLLOWING CHAPTER 7 OPEN AND CONFIRMATORY ITEMS Page 2
SER Section 7.4.2:
~Oem 'Item:
The applicant will install transfer switches for one division to enable the operator to cope with a fire in the control room (see Section 9.1e5 of this SER).
Revised'lectrical drawings (PVNGS FSAR Chapter 1.7) for approximately forty controls are ho be submitted to the staff prior to fuel loading.
The'taff will audit these drawings prior to fuel load to confirm that the installation of, the'ransfer switches (a) provides the desired electrical isolation 'from the control room of instrumentation, controls and power-sources and (b) does not compromise the design with respect to GDC 19.
As we stated'n oui response to Confirmatory Item //11 of the BOP IGC Drawing Review'eeting.on September 8-11, 1981, in an October 2, 1981 letter from E. E. Van Brunt, Jr. to R. L. Tedesco, ANPP-19078, APS confirms that added'ransfer'witches in the control room will provide desired isolation and willnot compromise the design with respect to GDC-19.
For more information on the circuits transferring and methods, please'efer'or an August 28, 1981 letter from E. E. Van Brunt to R.
L. Tedesco,'ANPP-18781.
SER Section 7.6.2:,
~ r
~ r Confirmator 'tem'.
Low temperature overpressure alarms are to be installed at PVNGS.1'-'3 APS will install a low temperature over pressure alarm in PVNGS Units 1, 2, and 3.'he'larm willmonitor the SDC isolation valve positions.
When these valves are open'= and the'ressure is greater than 400 psia, the'larm willbe initiated; SER Page 22.2,Section II.D.3:
'Confirmator Item:
The'coustic monitoring system to provide direct pressurizer safety valve position indication is to be installed and calibrated prior to fuel loading.
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~
RESPONSE
TO.THE FOLLOWING'CHAPTER' OPEN AND CONFIRMATORY ITEMS
Page 3
APS will provide an acoustical monitoring position indication system for the'ressurize'r relief'valves.
This system has been procured from Technology for Energy Corporation.
We will.have it installed and calibrated prior'to fuel'oad.
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