ML17301A163

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Submits Test Info Re Tec Model 159 Isolator Module Omitted from 850114 Submittal Concerning DBE Testing of Isolation Devices Used in Spds.Integrity of Isolation Boundary Would Be Maintained If Max Credible Fault Occurred
ML17301A163
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 04/09/1985
From: Williams J
FLORIDA POWER & LIGHT CO.
To: Thompson H
Office of Nuclear Reactor Regulation
References
L-85-137, NUDOCS 8504120254
Download: ML17301A163 (5)


Text

REGULATORY FORMATION DISTRIBUTION S M (RIDS)

AOCESSION. NBR >85O4120250 DOC. DATE: 85/Og/09 NOTARIZED; NO DOCKET'- 0 FACIL!50 335 St', LUcje Plant< Unit 1< Florida Power 8 Light Co, 05000335 389 St"0 Lucie Plantg Unit 2i Florida Light- 05000389

'0 Power 8 Co.

AUTH;NAME AUTHOR AFFILIATION HILLIAMSgJ ~ N~ F l ot idaI Power. 8 Light" Co, RECIP ~ NAME'ECIPIENT AFFILIATION

>>THOMPSONiHeL ~ Division of Licensing

SUBJECT:

Submits test info re TEC Mode] 159 isolator module omitted from,850110 submittal concerning DBE'esting of isolation-deVices- used in "SPDS.Integer ity of isolation boundary would be>> maintained if max credible fault occunred.

DISTRIBUTION CODE. AOOID .COPIES RECEI/ED:LTR TITLE: OR Submittal: Gener al Distr ibution j 'NCL f SIZE:.

NOTES- 05000335 OL'e 02/01/76 05000389 OLe-04/06/83 RECIPIENT'D COPIES RECIPIENT .COPIES CODE/NAME, LTTR ENCL>> ID CODE/NAMET LTTR ENCL'7 NRRI ORB3 'BC 01 7 7 NRRl ORB3 BC 01 '7 INTERNAL'CRS 09 6 6 ADM/LFMB 1 0 ELD/HDS2" 1 0 NRR'/DE/MTEB 1 1 NRR/DL'IR 1 1 NRR'/DL/ORAB =0 NRR/DL/TSRG 1 NRR' I"/METB 1 1 NRR/DSI/RAB 1 1 04 1 1 RGN2 1 1 EXT'ERNAL ~ EGLG BRUSKE'g S 1 1 LPDR>> 03 1 1 NRC "PDR 02 1 1 NSIC 05 1 1 TOTAL NUMBER OF COPIES REQUIRED: L'TTR 30 ENCL'4

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~R . 9 1905 L-85-I37 Office of Nuclear Reactor Regulation Attention: Mr. Hugh L. Thompson, Director Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Thompson:

Re: St. Lucie Unit Nos. I & 2 Docket Nos. 50-335 & 50-389 SPDS Implementation P lan and Parameter Selection Re ort In FPL letter L-85-l9 dated January 14, l985, Florida Power & Light Company (FPL) provided information regarding DBE testing of isolation devices used in the Safety Parameter Display System (SPDS) at both St. Lucie and Turkey Point Plants. It was later identified by the staff s reviewer that no test information was provided in our January l4, I 985 submittal regarding TEC's Model I 59 isolator module, which is used in the St. Lucie Plant SPDS.

The Model I59 isolator was tested in essentially the same configuration as that used for the Models described in FPL letter L-85-l9 (see Figure I). I20 VAC was applied in the transverse mode across the non-IE outputs of the isolator. An oscilloscope was hooked up at the IE input side of the isolator to monitor perturbations. Results of the test showed an initial perturbation of about.3 volts peak for about 200 micro seconds (beginning to end of pulse). No other perturbations were observed.

FPL concludes that the integrity of the isolation boundary would be maintained should a maximum credible fault occur during system operation.

Very truly yours,

~J.~ W.~ Willi,

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