ML20205M990

Summary of 870304 Meeting W/Util Re Plant SPDS Isolation Device Design.List of Attendees Encl

ML20205M990
Person / Time
Site:	Fermi
Issue date:	03/27/1987
From:	Stefano J Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8704020552
Download: ML20205M990 (15)

Text

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March 27, 1987

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.- a Docket No. 50-341 LICENSEE: DetroitEdisonCompany(DECO)

FACILITY: Fermi-2 i

SUMMARY

REPORT OF MEETING WITH THE DETROIT EDISON COMPANY RE

THE FERMI-2 SAFETY PARAMETER DISPLAY SYSTEM (SPDS) ISOLATION i

DEVICE DESIGN i A meeting notice was issued on March 4,1987; and the meeting _ was held at the

, Fermi-2 plant site on Thursday, March 19, 1987, for the purpose of obtaining additional information in determining the acceptability of the Validyne Inc.-

Model CM249-Q2 Modulator Unit as-a Class IE/Non Class IE electrical isolation device. The formal slide presentation of the SPDS design was presented by DECO,

. a copy of which is attached as Enclosure (1). Enclosure (2) is a list of the .

meeting participants. The list includes' representatives from Commonwealth Edison 'j and Sargent-Lundy for'the La Salle 1/2 Nuclear Plant which uses an SPDS isolation device similar to that installed at Fenni-2.-

! Concern was initiially raised by the NRC staff as to the ability of the Fermi-2 SPDS isolation device design to preclude electrical faults from penetrating .

barriers into Class IE electrical circuits with which the SPDS (a non-saftey system) interfaces. The Vaildyne Model CM249-Q2 Modulator is the isolation ,

device used as such a barrier in the Fermi-2 SPDS design _as well as in La Salle t

. SPDS design. Questions describing the NRC staff's concerns were communicated to DECO by letter dated November 3,1986. Deco responded to those questions by letter dated December 15, 1986. (System details forwarded by the December 15,-

1986, letter are essentially those contained in Enclosure (1) to this report).

3 It was the staff's position, having reviewed the December 15, 1986 submittal, i that DECO:

Evaluate the SPDS isolation device for MCF voltace and current. 'The MCF

voltage is defined as the maximum voltage, ac and dc, that is present

inside the cabinet that houses the isolator (s). This' voltage is typically.

120 VAC or 125 VDC. In some isolated cases, the MCF voltage could be 208 i VAC or 480 VAC. The MCF current is-defined as the ampere rating-of the protective device that is supplying the MCF voltage that is external to the isolator cabinet and is usually rated at 20 amperes.

• Test the isolation device (s) with the MCF voltage and current. The MCF i test is defined as applying the MCF voltage and the maximum potential  !

current directly to the plus and minus output tenninals of the isolator '

unit in the transverse mode. During the test, the isolator is energized and a normal signal is applied to its input. The isolator input is monitored during the test with instrumentation capable of detecting voltages with high frequency response; i.e. one millisecond.

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_2 Define the pass / fall criteria for the isolation' device. The pass / fall:

criteria are defined as being no breach of the isolation barrier and no -

propagation of the MCF voltage / current through the barrier from the non-class IE side of the barrier; .i.e., destruction of the isolator will .not.-

result in a hard breach of the isolation barrier connecting the output to the input, thus coupling the MCF voltage / current directly to the safety-system. These criteria do not preclude the fact that a low energy pulse

^

may appear on the isolator's input, then disappear as isolation destruction ends and conductive paths are burned open.

However, in view of the additional descriptive details presented by DECO at the meeting, the NRC staff agreed to reconsider its position as stated above, and that the Project Manager would advise DECO of.the need to test the Validyne isolation device by telephone on March 30, 1987. An SER delineating the staff's position would be formally transmitted soon thereafter.

The meeting was adjourned at 12:00 p.m.

/S/

John J. Stefano, Sr. Pro'fect Manager BWR Project Directorate No. 3 Division of BWR Licensing

Enclosures:

As Stated cc: See next page i

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March 27, 1987 l MEETING

SUMMARY

DISTRIBUTION E9tRB41%~

NRC PDR-Local PDR BWD #3 r/f J. Partlow E. Adensam Attorney, OGC E. Jordan

B. Grimes ACRS(10)

Project Manager a_ w rann E. Hylton R. Bernero G. Lainas A. Bournia NRC PARTICIPANTS R. Stevens E. Marinos 3

R. Ramirez 1

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bec: Applicant & Service List l

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-w ,- . . . _ _ _ . _ . . _ _ , _

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f Mr. B. Ralph Sylvia Detroit Edison Company Fermi-2 Facility cc:

Mr. Harry H. Voigt, Esq. Ronald C. Callen LeBoeuf Lamb, Leiby & MacRae Adv. Planning Review Section 1333 New Hampshire Avenue, N. W. Michigan Public Service Commission Washington, D. C. 20036 i 6545 Mercantile Way P. O. Box 30221 John Flynn, Esq.  ! Lansing, Michigan 48909 Senior Attorney  ;

Detroit Edison Company Regional Administrator, Region III 2000 Second Avenue U. S. Nuclear Regulatory Comission Detroit, Michigan 48226 '

799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Dennis R. Hahn, Chief 4 Nuclear Facilities and Environmental Monitoring Section Office .

Division of Radiological Health P. O. Box 30035 Lansing, Michigan 48909 ,

Mr. Steve Frost Supervisor-Licensing Detroit Edison Company Fermi Unit 2 6400 North Dixie Highway Newport, Michigan 48166 i Mr. Thomas Randazzo Director, Regulatory Affairs Detroit Edison Company Fermi Unit 2 6400 North Dixie Highway Newport, Michigan 48166 Mr. Walt Rogers U. S. Nuclear Regulatory Commission Resident Inspector's_0ffice 6450 W. Dixie Highway Newport, Michigan 48166 Monroe County Office of Civil Preparedness 963 South Raisinville Monroe, Michigan 48161

helAsstat.,(l)

SWETY PAP #EER DISPLAY SYSEM  :

EERECY RESPONSE IWORMTIDN SYSTEM 04 0 0 m/ & EVENTS 8 FESil 2 JULY 1981 PROVAL FOR USE 7 OE49-02 ISOLATORS IN PES %NENT INSTALLATION OF STARTREC.

ERIS/SPDS PURCHASE SPECIFICATION OCT ER 1981 WITH SAI SYSTEM HARDWARE AT SAI APRIL-MAY 192 7 FIGS SUPPLE 2NT 1 TO N. REG-0737 DECEMER 192 FACTORY PERF04%NCE TEST AT JULY, Aus>sT 1983 SAI DELIVERED Ato INSTALLED AT NafEWER 1983 FESil 2 SITE FILED SPDS - SAFETY AfMLYSIS APRIL 1984 REPORT WITH PRC SPDS OPERATIONAL DECEWER 1985 E !PDS SAFETY EVAuRTION NOVEMER 19%

RESPONSE TO E ON REQUEST DECEWER 1986 FOR ADDITIONAL INFORf% TION ON ISQ.ATORS I4EETING iSCLATION M@CH 19,1987

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NRC/ DECO MEETING ON SPDS ISOLATI0fl DEVICE DESIGN MARCH 19, 1987

,i NAME ORGANIZATION / TITLE TEL_EPHONE #

John J. Stefano NRC/NRR Proj. Mgr. 301-492-9473 i Angelo Marinos NRC/NRR Chief EICSB 301-492-7141  ;

Ray Ramirez NRC/NRR EICSB 301-492-4204 Thomas Randazzo Detroit Edison-Dir, Reg HFF 313-586-4320 Steve Frost Detroit Edison Licensing 313-586-4210 WS Urser Detroit Edison 313-586-1901 '

Frank Agosti DECO VP Nuc. Oper 313-586-4157 Lawrence F. Wooden DECO 313-586-1736 Charles M. Allen Commonwealth Edison 313-294-3962 William L. Roskind DECO 313-237-8250 Steve Cashell DECO 313-586-4513 Arthur E. Nolan EG8G Idaho, Inc. 301-443-7858 Robert W. Stevens NRC/NRR/EICSB 301-492-9456 .

Roger M. Schiavoni Sargents & Lundy/Sr Engr. 312-269-2214

Charles H. Furlow Sargent & Lundy/SEPE 312-260-7662 Michael J. Jordan U.S. NRC, Sr. Resd. Insp. La Salle' 815-357-8611 Samuel R. Dileto Comnonwealth Edison /Sen. Eng 312-294-2845 Evelyn Madsen DECO 313-586-4205 l

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