ML20236X665

Requests Addl Info Re Review of Integrated Control Sys & non-nuclear Instrumentation Sys as Part of SER Concerning Restart of Plant

ML20236X665
Person / Time
Site:	Rancho Seco
Issue date:	12/04/1987
From:	Kalman G Office of Nuclear Reactor Regulation
To:	Andognini G SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
NUDOCS 8712100016
Download: ML20236X665 (16)

Text

- _ _ .

• - C December 4, 1987 a

Docket No.: 50-312 Mr. G. Carl Andognini Chief Executive Officer, Nuclear Rancho.Seco Nuclear Generating Station 14440 Twin Cities Road Herald, California 95638-9799

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION, ICS/NNI The staff is performing a review of the Integrated Control System and

-Non-Nuclear Instrumentation systems as a part of the Safety Evaluation Report related to the restart of Rancho Seco Nuclear Generating Station. During.this i review, we have identified areas where additional information is required.

Please provide the-information requested in the attachment to this letter as soon as possible so that our review can be completed without impacting your restart schedule.

/s/

George Kalman, Project Manager Project Directorate V Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated DISTRIBUTION e :

N Docket #11e n v OCG - Bethesda 8'NRC & i.ocal PDRs EJordan PDV. Reading JPartlow DCrutchfield 'ACRS(10)

GKalman i 0FC DRSP: hY D , DPSP l NAME GKal (:CW o hton DATE 12/ /8X- 12/ /87 1

0FFICIAL RECORD COPY l

A l P )

l J

ICSB PE0lIEST F0P INFORMATION RANCHO SECO By letter dated October 30,1986 (JEW-86-652), the staff was provided with information associated with indication and centrols independent of ICS/NNI power. The information supplied to cate does not sufficiently address the adecuacy of the backup (independerit) instrun,cntation and controls available to the control room operators for events related to the loss of ICS/NNI power. The staff has subsequently developed a table (attached) which identifies in more detail what information (specific column categories) is r(cuired to complete our review in this area. The staff has partially filled in the table Lased on its understanding of the Rancho Seco design.

The District is reouested to complete and/or nodify the existing information

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supplied for each column of the table as necessary to accurately reflect to )

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the staff the proposed Rancho Seco design planned for plant restart.

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