ML20149L097
| 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
5 e
February 10, 1988 Docket No.:
50-344 Mr. David W. Cockfield Vice President, Nuclear Portland General Electric Company i
121 S.W. Salmon Street Portland, Oregon 97204 1
Dear Mr. Cockfield:
SUBJECT:
REQUEST FOR ADDITIONAL INF0PNATION RELATED TO LCA 160 -
1 DELETION OF REQUIREMENT OF SOURCE RANGE PLATEAU CVRVES (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 l
plateau curves, to obtaining detector discriminator bias curves.
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 Enclosure As stated i
DISTRIBUTION 3
Q ocket Fi1 C,
TChan wa.Qmft-Ttocal PDRs OGC i
PD V Reading EJordan l
i DMCrutchfield JPartlow ACRS (10) i A
/
,6FC :DRSP/PDV
- DR
..... :............ :. g'5 Ph0 :4.PDY
.t 1
8002240123 800210
-NAME :TChan:CW
- GWKnighton DR ADOCK O 4
......:............:he..........:..
p 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.
I 4.
Does either test etuse any measurable, or otherwise observable, detector degradation, i
4 1
l i
J J
l l
j l
j I
1 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 i
Board of County Commissioners 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
.