ML20238D408

Forwards Staff Evaluation of Engineering Rept ERPT-E0220 Re Reactor Regulation of Util Approach to Compliance W/Reg Guide 1.75 for New Diesel Generator Installation at Plant. Licensee Approach Acceptable

ML20238D408
Person / Time
Site:	Rancho Seco
Issue date:	09/03/1987
From:	Thadani A Office of Nuclear Reactor Regulation
To:	Kalman G Office of Nuclear Reactor Regulation
Shared Package
ML20238D411	List: ML20238D408 ML20238D415
References
RTR-REGGD-01.075, RTR-REGGD-1.075 NUDOCS 8709110159
Download: ML20238D408 (1)

Text

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September 3,1987 j j

MEMORANDUM FOR: George Kalman, Project Manager Project Directorate - V Division of Reactor Projects - III j IV, V and Special Projects FROM: Ashok Thadani, Assistant Director I for Systems  !

Division of Engineering and Systems Technology

SUBJECT:

RANCHO SECO - ELECTRICAL SEPARATION POSITIONS (REGULATORY ) l GUIDE 1.75 - PHYSICAL INDEPENDENCE OF ELECTRICAL SYSTEMS)

During its review of proposed License Amendment 147 for Rancho Seco, the staff {

requested SMUD (the licensee) to describe how the design and installation of j the new TDI diesel generators and associated electrical equipment met the.

positions in RG 1.75.

On June 2 and 3, 1987, the staff met with representatives of the licensee to discuss RG 1.75 compliance. At these meetings, the licensee identified speci-fic areas at Rancho Seco where the positions of RG 1.75 regarding physical separation were not met. For these areas, the license proposed to demonstrate by analysis and/or test that the installed cable / wire configurations are accep-table. The licensee's approach for demonstrating acceptability was discussed ,

in detail at these meetings.  !

At the conclusion of the meetings, the staff had agreed in principle with the licensee's approach. It was recommended that the licensee document their approach and submit it to the NRC for review and evaluation. On June 26, 1987,  ;

the licensee formally submitted Engineering Report ERPT-E0220, which details l the licensee's approach for demonstrating compliance with RG 1.75, for NRC review. The report was submitted under cover of SMUD letter, serial GCA87-212 dated June 26, 1987. ]

Enclosed is the staff evaluation of Engineering Report ERPT-E0220. The staff finds the licensee's approach to be acceptable, subject to an audit of the ,

actual installations by NRC staff.

l l5l Ashok Thadani, Assistant Oirector  ;

for Systems l Division of Engineering and System Technology Distribution:

Docket File.

'NRC'PDh'"

PD4 Reacing File ETomlinsoa J.Calvo ,

P.Noonan A. Thadani (R dy G. Knighton PD4 PD4 M SAD l ETo inson JACalvo AThad 11 8&4/87 8/7c/87 $/ 3 /87 8709110159 870903 PDR ADDCK 05000312 1 P PDR l -