ML17297A454
| ML17297A454 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/27/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| ANPP-18076-JMA, NUDOCS 8106030297 | |
| Download: ML17297A454 (12) | |
Text
REGULATOfINFORMATION DISTRIBUTION TEM (RIBS)
ACCESSION NBR:8106030297,,
DOC ~ DATE: 81/05/27 NOTARIZED:
NO FACIL~:STN 50 528 Palo Verde Nuclear Statian~
Unit 1E Arizona Publ) 5000528 STN 50-529 Pal.o-Verde Nuclear Stations Un)t 2'F Arizona Publi STN 50-530 Palo Verde Nuclear Statian< Unit'r. Arizona Publi 05000530 AUTH',NAME,,
AUTHOR AFFILIATION VAN. BRUNTFK ~ ED Arizona PublicService Co.
REC IP B NAME RECIPIENT AFFILIATION DENTONiH ~ R ~'ffice of Nuclear ReactorI Regulations Director~
SUBJECT:
Clarifies 810501 response to NRC 810310
.1 tr to,all pending.
OLI applicants of Westinghouse 3 C-'". NSSS.Info pravide'd! for safety evaluation pr eparation on aux'ilia>y feedwater sys.'ISTRIBUTION CODE:
BO0 IS COPIES RECEIVED:LTR, J 'NCL. j.
SIZE.g TITLE'. PSAR/FSAR AMDTS and Related Correspondence-NOTES:Standardized Plant; 1 cy:C'p)mes
'Sta'ndardized Plant.
1 cy.'C Grimes:
Standardized Plant F 1 cy!C Grimes 05000528 05000529 05000530 REC IP IKNT ID CODE/NAME>
ACTION:
A/D L ICE NSNG LIC-BR P3 LA INTERNAL: ACCID EVAL BR26 CHEM ENG BR 08 CORE'ERF BR 10 EMERG PREP
22 EMRG PRP LIC FEMA REP DIV HUM FACT ENG BR ISC SYS BR 16 LIC GUID BR MATL ENG BR'7 MPA OELD POWER SYS'R 19 QA BR 2l REAC SYS BR-23 SIT'NAL BR
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RECIPIENT ID CODE/NAME LIC BR 03 BC KERRIGANEJ ~
04 AUX SYS'R 07 CONT SYS BR 09 EFF TR.SYS BR12 EMRG PRP DEV.
EQUIP QUAL BR13 GKOSCIENCES i 9 HYD/GEO BR 15 I 3 E" 06 LIC QUAL'R MECH ENG BR 18 NRC PDR 02 OP LIC. BRh PROC/TST',REV 20 BR22" REG F ILK 01 BR25
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'HOENIX( ARI2ONA BSO36 May 27, 1981 ANPP-18076 - JMA/TFg Mr. Harold R. Denton Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington D.
C.
20555
Subject:
Palo Verde Nuclear Generating Station Docket Nos. STN-50-528/529/530 Fi 1 e 81-056-'026 (PVNGS) Units 1, 2 and 3.-
References:
(A) Letter from D. F.
Ross NRC, to all pending OL applicants of NSSS designed by Westinghouse and Combustion Engineering, dated March 10, 1981.
(B) ANPP-17884-JMA/TFg, Dated May 1, 1981.
Dear Mr. Denton:
Attached is clarification to our response, reference (B) to your letter, reference (A).
Item gl Recommendation 5.2.6 (GS-6).
The response did not address the second operator independently verifying valve alignment.
The NRC requires this second operator verification and his sign-off on the procedure.
Item 0'2 Recommendation 5.2.6 (GS-6).
During the AFW independent design review
- meeting, Mr.,Wermiel'xpanded the definition of "extended cold shutdown.."
AFW Transcript,
- p. 213, states that prior to plant startup following a refueling shutdown or any cold shutdown 30 days or longer, a flow test will be performed to verify the normal flow path from the primary AFW system water source to the steam generators.
Res onse to bl and 82 A
When an AFW system flow train has been out of service to perform testing or maintenance, the flow path availability will be confirmed by:
t l.
Implementing procedures that require an operator to determine that the AFW system valves are properly aligned and a second operator to independently verify and sign off on the procedure that the valves are properly aligned.
81 06 03 0 QQ7
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ANPP-18076-JMA/TFg Hay 27, 1981 Page 2
2.
PYNGS will adopt Technical Specifications to assure that, prior to plant start-up following a refueling shutdown or any cold shutdown 30 days or longer, a flow test will be performed to verify the normal flow path from the primary AFW system water source to the steam generators.
Item ¹3 Recommendation 5.3.2 requested a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> endurance test for the AFW system pumps.
This requirement was changed to a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance test.
Refer to NUREG-0635,
- p. 3-10 footnote.
Also see AFW Transcript,
- p. 211.
~Res ense PVNGS will perform as part of the start-up test requirements a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance test on the AFW system pumps.
Following the 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> pump run, the pumps will be shutdown and cooled down and then restarted and run for one hour.. Test acceptance criteria wil,l. ihclude demonstrating that the pumps remain within design limits with respect to bearing/bearing oil temperatures and vibration and for the two (2) essential AFW system pumps that the pump room abient conditions do not exceed environmental qualification limits for safety-related equipment in the room.
Item ¹4 Recommendation 5.3.4.
provide further clarification of the procedures involved in periodic AFW testing.
The concern is that when an essential AFW train is in testing mode, there is only one AFW train which will automatically start on receipt of an AFAS.
The reactor operator needs to be fully aware that if the one remaining essential AFW pump fails to start, he will need to take manual action.
Please provide clarification of the operator's action for this situation.
Item ¹5 The NRC also requires the Auxiliary Feedwater System Technical Specification to be modified to incorporate the third AFW train.
Res onse 'to ¹4 and ¹5 PVNGS will require local manual realignment of'alves to conduct periodic test on one AFW system train and will have one remaining essential AFW train avail-able for operation.
In addition, the Start-Up AFW Pump, which is provided with an emergency power source, will be available to supply auxiliary feedwater to the steam generators from the Condensate Storage Tank.
The flow path used by the Start-Up AFW Pump is separate from the Essential AFW Pump flow paths.
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ANPP-18076-JMA/TFQ May 27, 1981 Page 3
The reactor operator will be informed of the periodic test being performed on the AFW system train prior to the test, through a status list for equip-ment which is required to be tested by the standard technical specifications.
Through normal training and caution statements in the periodic testing pro-
- cedure, the reactor operator will be aware that'anual action is required should an AFAS be, actuated during a periodic test of an AFW train.
The Auxiliary Feedwater System Technical Specification will be modified to incorporate the third AFW train.
Item ¹6 Verify that the Feedwater Control Valves can be operated with a loss of normal AC power.
~Res onse The Feedwater Control Va1 ves ar e equi pped with a back-up power source, batteries with a converter, so that they may beoperated in case of a loss of normal AC power.
Item ¹7 Will the suction valves on the start-up AFW pump be left open or closed after normal use, start-up, hot standby and shutdown?
~Res onse The suction valves will be closed to isolate the Condensate Storage Tank.
Item ¹8 Will the two suction valves to the start-up AFW pump be powered from separate busses so that a single failure will not violate the seismic integrity of the Condensate Storage Tank (CST)?
~Res onse The two valves are powered from different motor control centers so that with a failure of one motor control center the CST can still be isolated.
I
ANPP-18076-JMA/TFg May 27, 1981 Page 4
This information is provided to assist in your understanding of our design and operation of the Auxiliary Feedwater
Very truly our,
nu4 E.
E.
Van Brunt, Jr.
APS Vice President Nuclear Projects ANPP Project Director EEVBJR/TFg/sh cc: J.
Kerrigan J.
Wermiel
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Mr. Harold R. Denton ANPP-18076-JMA/TFg May 27, 1981 Page 5
STATE OF ARIZONA
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ss.
COUNTY OF MARICOPA)
I, Edwin E.
Van Brunt, Jr., represent that I am Vice President Nuclear Projects of Arizona Public Service Company, that the foregoing document has been signed by me 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 are true.
Edwin E.
Van Brunt, Jr.
~ Sworn to before me this ~@day of
';a
, 1981.
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My Commission expires:
NY Commission Expire Jan. 23, ~N4 Notary Public
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