ML20151U111

Forwards Safety Evaluation Supporting Util Proposed Design to Meet Requirements of ATWS Rule 10CFR50.62

ML20151U111
Person / Time
Site:	Prairie Island
Issue date:	08/17/1988
From:	Diianni D Office of Nuclear Reactor Regulation
To:	Musolf D NORTHERN STATES POWER CO.
Shared Package
ML20151U116	List: ML20151U111 ML20151U118
References
TAC-59130, TAC-59131, NUDOCS 8808180406
Download: ML20151U111 (3)

Text

August 17, 1988

. 4 Docket Nos. 50-282 and 50-306 Mr. D. M. Musolf, Manager Nuclear Support Service.s Northern States Power Company 414 Nicollet Hall Minneapolis, Minnesota 55401 Dear Mr. Musolf

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS N05. 1 AND 2, COMPLIANCE WITH ATWS RULE, 10 CFR 50.62 (TACS NOS. 59130/59131)

The NRC has reviewed the proposed implementation of the anticipated transient without scram (ATWS) rule (10 CFR 50.62) requirements as related to the Prairie Island Nuclear Generating Plant, Units Nos. 1 and 2. The review was based on the Northern States Power Company's submittals dated February 27, April 3, August 28, and December 1, 1987, and March 15, April 22, and May 12, 1988.

The NRC staff concludes that the design proposed for the Prairie Island Nuclear Generating Plant, Units Nos. I and 2, meets the requirements of 10 CFR 50.62 and therefore is acceptable. The staff's conclusion is contingent upon the successful completion of certain noted human-factors engineering studies and the satisfactory completion of the qualification of the isolation devices to which you have committed to complete before the ATWS neitigating system circuitry (AMSAC) is declared operational. The final resolution of the Technical Specifications will be covered separately as a future effort.

The NRC staff has also reviewed your proposed schedule for implementation prior to startup of Cycle 14 (November 1989) for Unit No.1 and prior to startup of Cycle 13 (March 1989) for Ur.it No. 2. We find these implementation schedules for both units acceptable. "

This completes our work effort under TACs 59130 and 59131, and a copy of our Safety Evaluation covering this issue is enclosed.

Sincerely, original signed by Dominic C. Dilanni, Project Manager Projact Directorate III-1 ,

Division of Reactor Projects - III, IV, V

& Special Projects

Enclosure:

Safety Evaluation cc w/ enclosure:

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Docket Nos. 50-282 and 50-306 Mr. D. M. Musolf, kanager Nuclear Support Services Northern States Power Company 414 Nicollet Hall Minneapolis, Minnesota 55401 Dear Mr. Musolf

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS HOS. 1 AND 2, COMPLIANCE WITH ATWS RULE, 10 CFR 50.62 (TACS NOS. 59130/59131)

The NRC has reviewed the proposed implementation of tha anticipated transient without scram (A1VS) rule (10 CFR 50.62) requirements as related to the Prairie Island Nuclear Genarating Plant, Units Nos. I and 2. The review was based on the Northern States Power Company's submittals dated February i ? April 3, August 28, and December 1, 1987, and March 15, April 22, and hay 12, 1988.

The NRC staff ccncludes that the design proposed for the Prairie Island Nuclear Generating Plant, Units Nos. 1 and 2, meets the requirements of 10 CFR 50.62 and therefore is acceptable. The staff's conclusion is contingent upon the successful completion of certain noted human-factors engineering studies and the satisfactory completion of the qualification of the isolation devices to which you have committed to complete before the ATWS mitigating system I circuitry (AMSAC) is declared operational. The final resolution of the Technical Specifications will be covered separately as a future effort.

l The NRC staff has also reviewed your proposed schedule for implementation prior i to startup of Cycle 14 (Nnvember 1989) for Unit No. 1 and prior to startup of l Cycle 13 (March 1989) for Unit No. 2. We find these implementation schedules i for both units acceptable.

This completes our work effort under TACs 59130 and 59131, and a copy of our Safety Evaluation covering this issue is enclosed.

l Sincerely, j.

b /

-_m_y Dominic C. Dilanni, Project Manager Project Directorate III-1 Division of Reactor Projects - III, IV, V

& Special Projects

Enclosure:

Safety Evaluation l

l cc w/ enclosure:

See next page l

Mr. D. M. Musolf Prairie Islan'd Nuclear Generating

. Northern States Power Company Plant cc:

Gerald Charnoff, Esq.

Shaw, Pittnan, Potts and Trowbridge 2300 N Street, N.W.

Washington, DC ?0037 n* J. W. Ferman Minnesota Polletton Control Agency 520 Lafayette Road St. Paul, MN 55155

• Mr. E. L. Watzl, Plant Manager Prairie Island Nuclear Generating Plant Northern States Power Capany Route 2 Welch, Minnesota 55089 Jocelyn F. Olson, Esq.

Assistant Attorney General Environmental Protection Divis1or.

Suite 200 520 Lafayette Road St. Paul, Minnesota 55155 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakonade Drive East Welch, Minnesota 55089 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Office of Executive Director for Operations 799 Roosevelt Road G1;.1 Ellyn, Ill19ois 60137 Mr. William Miller, Auditor Goodhue County Courthouse Red Wing, Minnesota 55066 l

l 4

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