ML20154H072

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Provides Supplemental Info to Util Re AMSAC Design,Per 880510 Telcon.Util Will Comply W/Separation Specified in Section 8.7 of Updated SAR
ML20154H072
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 05/12/1988
From: Musolf D
NORTHERN STATES POWER CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8805250215
Download: ML20154H072 (2)


Text

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Northern States Power Company 4 4 Nicottet Mali Minneapoks, M.nnesota 65401 Telephnne (612) 330-5500 May 12, 1988 10 CFR Part 50 Section 50.62 Director of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING Pt\NT Docket Nos. 50-292 License Nos. D P.(- 42 50-306 DPR-60 Supplemental Information - Final AMSAC Design

Reference:

(a) Letter dated April 22, 1988, from D M Musolf, NSP, to Director NRR, NRC, "Description of Final AMSAC Design" The purpose of this letter is to provide information to supplement Reference (a). Documentation of this information was requested during a telephone conference call with the WRC Staff on May 10, 1988.

The following additional information rela:ed to the final AMSAC design selected for Prairie Island Units 1 and 2 is provided:

Separation Criteria The separation requirements specified in Section 8.7 of the Prairie Island Updated Safety Analysis Report (USAR) will be complied with.

AMSAC Actuation Relays Relays will be diverse, by manufacturer or by design, from relays used in the Reactor Protection System (RPS).

Relays ust.d as a safety-related circuit interface will meet class lE requirements.

Relays used as a safety-related circuit interface will meet the requirements of Appendix A of the July 7,1986, NRC Safety Evaluation Report (SEF). Item (c) of this appendi:: is understood to mean that the side of the device used in the. safety-related circuit shall be monitored while the fault is applied to the non-cafety reisted circuit side of the device.

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Director of NRR Northern States Power Company May 12, 1988 Page 2 The data showing qualification of applicablu isolation devices to Append!x A of the July 7,1986 SER will be available for a post-installation site audit of the AMSAC installation.

11uman Factors Considerations Any changes made to control room indication, controls, or alarms as a result of the AMSAC installation will have the approval of the Prairie Island Control Room Design Review Committee and con-form to the standards described in the Detailed Control Room Design Review Report.

C20 Setpoint The C20 setpoint will conform to WCAP 10858P A Section 4.12.1, unless future concerns deem it appropriate to make this setpoint variable. NRC approval vould be sought if a variable setpoint is used.

Please contact us if you have any questions related to the information we have provided.

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David Musolf Manager I!uclear Support Services c: Regional Administrator, Region III, NRC NRC Sr Resident Inspector  ;

NRC Troject Manager j G Charnnff l

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