ML20149L097

Forwards Request for Addl Info Re 871218 Application for Amend to License NPF-1,revising Tech Spec 4.3-1 on Reactor Trip Sys Instrument Surveillance Requirements to Obtaining Detector Discriminator Bias Curves

ML20149L097
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	02/10/1988
From:	Chan T Office of Nuclear Reactor Regulation
To:	Cockfield D PORTLAND GENERAL ELECTRIC CO.
References
TAC-66871, NUDOCS 8802240113
Download: ML20149L097 (4)

Text

e 5

February 10, 1988 Docket No.: 50-344 Mr. David W. Cockfield Vice President, Nuclear Portland General Electric Company 121 S.W. Salmon Street i Portland, Oregon 97204 1

SUBJECT:

REQUEST FOR ADDITIONAL INF0PNATION RELATED TO LCA 160 - 1 DELETION OF REQUIREMENT OF SOURCE RANGE PLATEAU CVRVES l (TACNO.66871)

By letter dated December la,1987, Portland General Electric. Company (PGE) submitted LCA 160 which would revise Technical Specification Table 4.3-1, i Reactor Trip System Instrumentation Surveillance Requirements by changing the ]

required surveillance from obtaining source-range nuclear instrument detector '

plateau curves, to obtaining detector discriminator bias curves. l We have reviewed your submittal and find that additional information is required before we can complete our review. We ask that you provide the ,

requested information contained in Enclosure 1 stithin 60 days from receipt of  :

. this letter, or provide and alternative schedule for doing so within 15 days. 1 The reporting and/or recordkeeping requirements of this letter affect fewer than ten respondents. Therefore, OMB clearance is not required under P.L.

96 511.

Sincerely, original signed by t Terence L. Chan, Project Manager j Project Directorate V Division of Reactor Projects - III.

IV, Y and Special Projects Office of Nuclear Reactor Regulation i l

Enclosure As stated ,

i

. DISTRIBUTION 3 Q ocket Fi1 C , TChan l wa.Qmft-Ttocal PDRs OGC i PD V Reading EJordan l i DMCrutchfield JPartlow ACRS (10) i

,6FC :DRSP/PDV A :DR

/

1

. . . . . : . . . . . . . . . . ..t. : . g'5 Ph0 :4.PDY 1

-NAME :TChan:CW :GWKnighton : 8002240123 800210  :  :

DR ADOCK O 4 ,,, ,,,,,,,,,, ..,,,,,,,,,,,

p ,

......:............:he..........:..

DATE :Q/40/88  : f/(D/88  :  : .  :  : 1 0FFICIAL RECORD COPY

l ENCLOSURE 1 REQUEST FOR ADDITIONAL INFORMATION- ,

RELATED TO LCA 160 1 l TROJAN NUCLEAR PLANT

^

DOCKET NO. 50-344 1

! 'i i

1. Describe the plant specific procedure for obtaining high voltage plateau curves, i 2. Describe the plant specific procedure' for obtaining discriminator bias )

curves.  !

3. Describe how discriminator bias curves give indication of detector degradation.  ;

4. Does either test etuse any measurable, or otherwise observable, detector I degradation, i

4 l

1 l

l l

i J

J l

l j

l j

1 I

l l

1 I l,

.-. . , , . --.,~- -. . . - . _ . - . _ . . , _, , . - ,m - . ,-y 7 . -. --

.--.w

a. -

Mr. David W. Cockfield Portland General Electric Company Trojan Nuclear Plant ec:

Senior Resident Inspector U.S. Nuclear Regulatory Commission Trojan Nuclear Plant Post Office Box 0 Rainier, Oregon 97048 Mr. Michael J. Sykes, Chairman Board of County Commissioners i Columbia County St. Helens, Oregon 97501 Mr. William T. Dixon Oregon Department of Energy Salem, Oregon 97310 Regional Admir.istrator, Region V U.S. Nuclear Regulatory Coamission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 1

l d

1 I

4

• S ENCLOSURE 1 REQUEST FOR ADDITIONAL INFORMATION RELATED TO LCA 160  ;

TROJAN NUCLEAR PLANT DOCKET N0. 50-344 >

1. Describe the plant specific procedure for obtaining high voltage plateau curves. ,

2. Describe the plant specific procedure for cotaining discriminator bias .

curves.

3. Describe how discriminator bias curves give indication of detector -

degradation.

4 Does either test cause any measurable, or otherwise observable, detector degradation.

t 1

l 6

I I

t

.