ML20215M374

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Submits Info Per 860922 Request for Schedule Addressing plant-specific Design Features of ATWS Mitigation Sys Actuation Circuitry.Design Will Be Submitted for Review & Approval by 870301.Implementation Scheduled for Cycle 13
ML20215M374
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 10/24/1986
From: Musolf D
NORTHERN STATES POWER CO.
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 8610300203
Download: ML20215M374 (2)


Text

.c Northern States Power Company 414 Nicollet Mall Minneapohs, Minnesota 55401 Telephone (612) 330 5500 October 24, 1986 Director Office of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Schedule for Implementation of AMSAC and Submittal of Plant Specific AMSAC Design Your letter dated September 22, 1986, which transmitted the NRC Staff Safety Evaluation (SE) of the Westinghouse Owners' Group generic design for the ATWS mitigation system actuation circuitry (AMSAC), requested that we provide our schedule for addressing the plant specific design features discussed in the last section of the SE and for implementation of these changes following the NRC Staff approval of the plant specific design.

The following information is provided in response to that request.

The Prairie Island plant specific AMSAC design, which will address the plant specific design features discussed in the last section of the NRC Safety Evaluation, will be submitted for NRC review and approval by March 1, 1987. Assuming NRC approval of the plant specific design is received by September of 1987, the AMSAC system will be installed prior to startup of Cycle 13 on each unit. The startup of Cycle 13 is presently scheduled for September 1988 for Unit 1 and March 1989 for Unit 2.

10 CFR Part 50, Section 50.i62, paragraph (d) specifies that final AMSAC implementation be complete no later than the second refueling outage following July 26, 1984 unless justification is provided for later implementation. The implementation of AMSAC at Prairie Island will occur after the second refueling outage following July 26, 1984 We believe this schedule is justified because of the length of time required for the review of the generic design, and the fact that Prairie Island operates with cycles significantly shorter than those assumed in the development of the 10 CFR Part 50, Section 50.62, paragraph (d) schedule.

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! .r Director NRR Northem States Power Company October 24, 1986 Page 2 Please contact us if you have any questions related to the information we have provided.

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  • David Musolf Manager - Nuclear Support Services DMM/EFE/efe c: Regional Administrator-III, NRC NRR Project Manager, NRC Resident Inspector, NRC G Charnoff