ML17297A802
| ML17297A802 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/28/1981 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| ANPP-18797-JMA, GL-81-21, NUDOCS 8109110408 | |
| Download: ML17297A802 (5) | |
Text
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9110408 DOC ~ OATEN': 81/08/28 NOTARIZED:
NO DOCKET Palo Verde Nuclear StationF Unit 1i Arizona Publi Palo Verde Nuclear StationP Unit 2F Arizona Publi 000529" Palo Ve'rde Nuclear StationF Unit 3F Arizona Publi 05000530.,
AUTHOR AF F IL'I AT I ON Ar izona Public Service, Co ~
REC'I PIENT AF F ILiIATION Division of Licensing
SUBJECT:
Advises that util is producing natural circulation cooldown guideline for use in drafting procedures to satisfy concernsi in NRC;, Genric Ltr 81 21.
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IRUflZMCI aalSIEPllt5lla tMIHB%BW P.O. BOX 21666 PHOENIX, ARIZONA85036 August 28, 1981 ANPP-18797 JMA/KWG Mr. Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
8)
Palo:Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3
Docket Nos.
STN-50-528/529/530 File:
81-056-026; G.1.10
Reference:
Letter from D. G. Eisenhut, to All Licensees of, and Applicants for, PWR Operating Licenses, dated May 5, 1981, subject:
Generic Letter ItII81-21 "Natural Circu-lation Cooldown"
Dear Mr. Eisenhut:
Arizona Public Service Company (APS), as project manager and operating agent for PVNGS, and as a member of the CE Owner's Group', is sponsoring the production of a "Natural Circulation Cooldown Guideline" to be published by CE for use in drafting procedures that will satisfy the NRC concerns in Generic Letter 81-21.
The report will be CENPSD-154 and it is expected to be available by August 31, 1981.
Upon receipt of CENPSD-154, APS will draft a Natural Circulation Cooldown operating procedure with an estimated completion date of six months after receipt of CENPSD-154.
An analysis consistent with the recommendations of CENPSD-154, supplemented as necessary with data from startup testing accomplished per CESSAR 14.2.12.5.1 and the special low power testing required by NUREG-0737, Item I.G.1 as modified by R. L. Tedesco's letter of June 12, 1981 to E. E. Van Brunt, Jr., will be conducted to verify that controlled natural circulation cooldown from oper-ating conditions to cold'hutdown conditions, conducted according to the oper-ating procedure, will not result, in reactor vessel voiding.
Additionally, an analysis applying conservative initial conditions and instru-ment errors will be made to show that sufficient condensate-grade auxiliary feedwater is available to achieve cold shutdown using the operating procedure.
8109l i0408 8i0828 PDR ADOCK OS000528 A
Mr. Darrell G. Eisenhut, Director August 28, 1981 ANPP-18797 JMA/KWG Page 2
Theory and procedures for natural circulation cooldown shall be included in the licensed operator training and retraining programs described in the PVNGS FSAR Sections 13.2.1.1.1 and 13.2.2.1.
Instruction shall include:
1.
Limitations on cooldown rates and their bases.
2.
Expected indications of natural circulation cooldown and indi-cations (such as rapidly changing pressurizer level) which would indicate voiding.
3.
Key points from natural circulation cooldown procedures.
If you have further questions, please contact me.
Very truly y or E. E. Van Brunt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director EEVBJr/KWG/av cc:
J. Kerrigan P. Hourihan A. C. Gehr
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