ML17298B607

Requests Schedular Exemption Until 850415 Re 10CFR50,App a Requirement That Auxiliary Feedwater Pumps Be Protected from Flooding Due to Piping Rupture.Design & Fabrication of Boot Seals Delayed

ML17298B607
Person / Time
Site:	Palo Verde
Issue date:	12/05/1984
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Knighton G Office of Nuclear Reactor Regulation
References
ANPP-31337-EEVB, NUDOCS 8412110283
Download: ML17298B607 (8)

Text

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'CCESS'ION NBR e 8012110283 DOC ~ DATE: 84/12/05 NOTARIZED'ES DOCKET FACIL:STN 50 528 Palo Verde Nuclear Stationi Unit li Arizona Publi 05000S28 STN-50-529 Palo Verde Nuclear Station~

Unit 2~ Arizona Publi OS000529 STN-50-530 Palo Verde Nuclear Stationi Unit 3i Arizona Publi 05000530 AUTH BYNAME AUTHOR AFFILIATION VAN BRUNTiE ~ ED Arizona Public Service Co.

RECIP ~ NAME RECIPIENT AFFILIATION KNIGHTON g G ~ l't ~

Licensing Branch 3

SUBJECT:

Requests schedular exemption until 850015 re 10CFRSO<App-A requirement that auxiliary feedwater pumps be protected from flooding due to piping rupture, Design 8 fabrication of boot seals

delayed, DISTRIBUTI N CODE:

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TITLE: Licensing Submi ttal:

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Arizona Public Service Company ANPP-31337-EEVB/KLI'1/MFQ December 5, 1984 Director of Nuclear Reactor Regulation Attention: Mr. George W. Knighton, Chief Licensing Branch No.

3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2 and 3

Docket Nos. STN-50-528/529/530 Appendix A Schedular Exemption File:

84-056-026; G.l.01.10

Dear Mr. Knighton:

Appendix A to 10CFR50 requires that the auxiliary feedwater pumps be protected from the effects of flooding due to piping rupture.

There are piping penetrations in the walls and ceiling of the auxiliary feedwater pump rooms that have not been sealed to provide flood protection.

The PVNGS design is being changed to add and modify seals to ensure flood protection.

At this time, the cold piping penetrations in the cei ling slab have been sealed by grouting.

The penetration sleeves containing insulated piping remain to be sealed.

Due to the need to accommodate differential axial and lateral motion of the piping relative to the cei ling slab, these will be sealed using a flexible boot design.

Congestion in the area has complicated and delayed design and fabrication of the boot seals.

It appears that these needed seals will not be available for installation prior to March 15, 1985.

Proof testing of the boot seal design will be conducted by the vendor in parallel with seal installation.

Wall seals are also being examined for their ability to withstand the pressure head associated with a flooded pump compartment.

The necessary changes can be completed by March 15, 1985.

Accordingly, the entire auxiliary compartment flood rated seal testing and installation are forecast to be completed by April 15, 1985, which is the projected date for initial criticality.

This change will be implemented prior to initial criticality.

Accordingly, there are no adverse safety consequences associated with granting this schedular exemption to April 15,

1985, since there will be no nuclear decay heat requiring the use of the safety grade auxiliary feedwater system.

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George W. Knigh~ n Appendix A Schedular Exemption ANPP-31337 Page 2

Please contact William quinn of my staff should you have any questions regarding this request.

Very truly yours, Z.&3~

E. E.

Van Brunt, Jr.

APS Vice President Nuclear Production ANPP Project Director EEVBJr/KLt1/no cc:

E. A. Licitra A. C. Gehr R.

P.

Zimmerman

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ANPP-31337 STATE OF ARIZONA

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COUNTY OF MARICOPA)

I, Donald B. Karner, represent that I am Assistant Vice President, Nuclear Production of Arizona Public Service

Company, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, 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.

dE Donald B. Karner Sworn to before me thts~day od s e I

1fy Commission Expires:

"-'jjjy(QtlNiil's'sloilExphtt >Pd~ d ~bby 1984.

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