ML20035E781
| ML20035E781 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 04/15/1993 |
| From: | Cross J, Walt T PORTLAND GENERAL ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-92-08, GL-92-8, NUDOCS 9304190242 | |
| Download: ML20035E781 (3) | |
Text
E see se Portland General Bectric Cosiipiniy I
James E. Cross Vice President and Chief Nuclear Officer l
l April 15, 1993 Trojan Nuclear Plant Docket 50-344 License NPF-1 i
i U.S. Nuclear Regulatory Commission Attn: Document Control Desk l
Washington DC 20555
Dear Sirs:
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Response to Nuclear Regulatory Commission (NRC) Generic Letter 92-08 The NRC, via Generic Letter 92-08, requested additional information from licensees to verify that Thermo-Lag 330-1 fire barrier systems manufactured by Thermal Science Incorporated (TSI) comply with the NRC's requirements. As stated in Portland General Electric Company's (PGE's) letter dated September l
28, 1992, responding to NRC Bulletin 92-01, Supplement 1, PGE does have Thermo-Lag 330-1 fire barrier material installed at the Trojan Nuclear Plant (TNP).
This material is used for compliance with Title 10 of the Code of l
Federal Regulations, Part 50 (10 CFR 50) Appendix R separation requirements.
As noted in the letter, appropriate compensatory actions consistent with an l
inoperable fire barrier have been taken relative to the Thermo-Lag i
installations.
PGE has submitted a License Change Application (LCA) to amend the Trojan Plant Operating License to a Possession Only License (POL). As noted in PGE's letter to the NRC dated March 15, 1993, neither 10 CFR 50.48 nor 10 CFR 50 Appendix R will be applicable to TNP after receipt of the POL, Since j
these regulations will not be applicable to TNP, Thermo-Lag 330-1 fire l
barrier material will not be required to meet the requirements of these l
regulations. Therefore, PGE will not be taking further action to restore l
Thermo-Lag 330-1 fire barriers to operability and thus is not providing the specific information requested in Item 2 of the Reporting Requirements of-Generic Letter 92-08.
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i 190176 I
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9304190242 930415 PDR ADOCK 05000344 11 SW Salmon Street,. Portland, OR 97204 P
PDR 503/464-8897
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Document Control Desk April 15, 1993 l
Par.e 2 J
PGE has reviewed ampacity calculations for power cables wrapped in Thermo-Lag.
It was determined that adequate margin exists to utilize the higher derating i
factors discussed in Generic Letter 92-08 with the exception of three cables.
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These cables supply:
- 1) Reactor Coolant Drain Tank Pump (P301B); 2) Control Rod Drive Blower (VC214B); and 3) Hydrogen Recombiner (X318B). Although some degradation of cable insulation =ry occur when higher derating factors are 4
utilized, the equipment serviced by these cables is not required with the plant permanently shut down and defueled.
PGE will continue to monitor ampacity derating issues and address them as necessary.
Sincerely, T. D. Walt for J. E. Cross c:
Mr. John B. Martin Regional Administrator, Region V U.S. Nuclear Regulatory Commission Mr. David Stewart-Smith State of Oregon Department of Energy Mr. Kenneth Johnston NRC Senior Resident Inspector s
Trojan Nuclear Plant 3
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1 STATE OF ORECON) f
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Subject:
1 COUNTY OF COLUMBIA)
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I, T. D. Walt, being duly sworn, subscribe to and say that I am the j
General Manager, Technical Functions for Portland General Electric
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l Company, the applicant herein; that I have full authority to execute this
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oath; that I have reviewed the foregoing; and that to the best of my knowledge, information, and belief the statements made in it are true.
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Date ob IOb, 1993 1
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T. D. Walt j
General Manager Technical Functions 3
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On this day personally appeared before me T. D. Walt, to me known to be j
the individual who executed the foregoing instrument, and acknowledged
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that he signed the same as his free act.
/5 day of $rl GIVEN under my hand and seal this
, 1993.
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JnL10]7.
>athn:2u.r Notary Public in and for the State of Oregon l
Residing atk 4 TIE 4)
My commission expiresd3-S G-9'/
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