GO2-83-814, Forwards WPPSS Unit 2 Single-Loop Operation Analysis. Rept Will Be Incorporated in Amend 32 to FSAR

Forwards WPPSS Unit 2 Single-Loop Operation Analysis. Rept Will Be Incorporated in Amend 32 to FSAR

ML17277A820
Person / Time
Site:	Columbia
Issue date:	09/08/1983
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML17277A821	List: GO2-83-814, Forwards WPPSS Unit 2 Single-Loop Operation Analysis. Rept Will Be Incorporated in Amend 32 to FSAR ML17277A822
References
GO2-83-814, NUDOCS 8309290514
Download: ML17277A820 (6)

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~l DOC ~ DATE o 83/09/08 NOTARIZED:

NO DOCKET FACIL:50-307 NPPSS Nuclear Project<

Unit 2E Washington Public Powe 0500tl397 AUTH ~NAME, AUTHOR AFFILIATION SORENSEN<G<C.

Washington Public Power Supply System

'RECIP.NAML RECIPIkN1 AFFILIATION SOHO)ENCEREA.

Licensing Branch 2

SUBJECT:

Forwards "NPPSS Unit 2 Single-Loop Operation will be incorporated in Amend 32 to,FSAR.

DISTRIBUTION CODE:

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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 September 8,

1983 G02-83-814 Docket No. 50-397 Director of Nuclear Reactor Regulation Attention:"- Mr. A. Schwencer, Chief Licensing Branch No.

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

20555

Subject:

NUCLEAR PROJECT NO.

2 RECIRCULATION SYSTEM SINGLE-LOOP OPERATION Attachment 1 analyzes Single-Loop Operation (SLO) for WNP-2.

In the event the recirculation pump or other component maintenance renders one loop inoperative, SLO operation of WNP-2 is a necessary option for continuous, reliable power generation.

This submittal justifies the use of SLO for WNP-2.

In summary, Attachment 1 concludes:

o No increase in rated MCPR operating limit and no change in the flow dependent Minimum Critical Power Ratio (MCPR) limit factors are required for Single-Loop Operation.

o The, Average Planar Linear Heat Generation Rate (MAPLHGR) reduction factor for single-loop operation is calculated to be 0.84.

o The containment response for a Design Basis Accident recircu-

- lation line break with single-loop operation is bounded by the rated power two-loop operation analysis presented in FSAR Section 6.2.

This attachment will be incorporated in Amendment 32 to the WNP-2 FSAR.

Additionally, Attachment 2 provides the changes required to the technical specifications to support single-loop operation consistent with the safety limits analyzed in Attachment 1.

The WNP-2 draft technical specification has been used for this attachment and only those changes highlighted by double parallel lines in the right hand margin apply to SLO.

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q7 830929055, 050003PQR POR ADOC

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A.< Schwencer Page Two September 8,

1983 RECIRCULATION SYSTEM SINGLE-LOOP OPERATION With this submittal, the Supply System is requesting that the option for SLO be included as a necessary part of the WNP-2 operating license.

Should you have any questions, please contact Mr. P. L. Powell, Acting

Manager, WNP-2 Licensing.

Very truly yours, G.

C.

S

ensen, Acting Manager Nuclear Safety and Regulatory Programs PLP/tmh Enclosures cc:

R Auluck -

NRC WS Chin BPA A

Toth NRC Site

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