ML20137N914

Forwards Test Plan Used in Testing SPDS Isolation Equipment from Interference & Provides Action Taken Re Info Needed for NRC Review

ML20137N914
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/05/1985
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Hunter D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
P-85309, TAC-51242, NUDOCS 8509190379
Download: ML20137N914 (5)

Text

,2 A e co.ii .

Company of Coiorado f

2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 P.O. Box 840 Denver, CO 80201 -0840 (303)571 - 7511 September 5, 1985 Fort St. Vrain Unit No. 1 P-85309 gion V U. S. Nuclear Reoulatory Commission l B@ G OV/R$ 'o 611 Ryan Plaza Drive, Suite 100 Sp I OM y Arlington, Texas 76012 Attn: Mr. Darwin Hunter J@

Docket No. 50-267

SUBJECT:

Safety Parameter Display System Safety Analysis Report

REFERENCES:

1) NRC Letter Johnson To Lee Dated 9/14/94 (G-84355)

2) PSC Letter Warembourg To Johnson Dated 7/19/84 (P-84372)

3) PSC Letter Warembourg To Johnson Dated 11/13/84 (P-84487)

Dear Mr. Hunter:

Attached please find test plan used in testing the SPDS Isolation Equipment from interference (i.e. Electrostatic Coupling, EMI, Comon hde And Crosstalk). This letter also provides the action taken in

egard to the information needed for staff review discussed in Reference 3, Item 7G.

N.R.C. requested: "with regard to isolation devices between the SPDS ard safety systems, provide the following information:"

Item 7.G. A description of the measu es taken to protect the safety system from electrical interference (i.e.

Electrostatic Coupling, EMI, Comon Mode And Crosstalk) .

that may be generated by the SPDS. * <

8509190379 050905 JD PDH ADOCK 05000267 p gN i

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E e Item 7.G. is addressed by attachment 1 to this letter. Attachment I describes the measures taken to protect the safety systems and test procedure used to verify the ability of the equipment to protect the safety system from electrical interference. The isolation equipment passed the testing for electromagnetic susceptibility test and the results are available for review if it is desired.

This item and PSC's submittal was inadvertently left out of PSC letter Warembourg to Hunter dated 8/26/85 (P-85300).

If you have any questions regarding this matter, please call Mr. M.

H. Holmes at (303) 571-8509.

Very truly yours, 0 0'- 1%s~/sm, D. W. Warembourg, Manager Nuclear Engineering Division Attachment cc: Mr. E. H. Johnson DWW/0W/km

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ATTACHMENT 1 TO El LETTER C50-4152-85 ELECTRICAL INTERFERENCE DESIGN CONSIDERATIONS The Energy Incorporated isolation system is enclosed in a grounded, 85*

coverage, ferrous metal enclosure. Tests to the requirements of SAMA PMC 33.1-1978 "Electronagnetic Susceptibility of Process Control Instrumentation" are scheduled with an independent testing firm. The test is tentatively scheduled for March 1985. The following pages show additional details.

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