ML20040H137
| ML20040H137 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 02/10/1982 |
| From: | Withers B PORTLAND GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20040H135 | List: |
| References | |
| NUDOCS 8202170249 | |
| Download: ML20040H137 (4) | |
Text
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l PORTLAND GENERAL ELECTRIC C0!iPANY EUGENE WATER & ELECTRIC BOARD AND PACIFIC POWER & LIGHT COMPANY I
TROJAN NUCLEAR PLANT Operating License NPF-1 Docket 50-344 License Change Application 83 l
This License Change Application is submitted to amend Section 4.4.3.2.1 l
and Table 4.3-7 of the Trojan Nuclear Plant Technical Specifications l
(Appendix A to Facility Operating License NPF-1) to upgrade the surveil-l lance requirements for the pressurizer PORVs and the valve position l
indicators for the PORVs and bicek valves.
l PORTLAND GENERAL ELECTRIC C0!!PANY l
By Bart D. Withers Vice President Nuclear l
Subscribed and sworn to before me this 10th day of February 1982.
l Notary Public of/ Oregon fy Commission Expires:
/ 4.ti d '
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8202170249 820210 PDR ADOCK 05000344 l
P PDR L
LCA 83 P ga 1 of 3 LICENSE CHANGE APPLICATION 83 Modify the below-listed pages of the Trojan Technical Specifications (Appen-dix A to FOL NPF-1), as shown in the
Attachment:
1.
Page 3/4 4-4a, Surveillance Requirements, Specification 4.4.3.2.1, " Safety and Relief Valves - Operating", should be replaced with the following statement:
"Each PORV shall be demonstrated Operable at least once per 18-months by performance of a CHANNEL CALIBRATION and operating the valve through one cycle of full travel".
2.
Page 3/4 3-53, Table 4.3-7, " ACCIDENT MONITORING INSTRU-MENTATION SURVEILLANCE REQUIREMENTS", add the following clarifying statement for monthly channel check requirement of valve position indicators:
"** Scope of the channel check is to observe applicable lighting of the valve position indicator for the current valve position".
REASON FOR CHANGE 1.
Technical Specification 4.4.3.2.1 requires *he continuity check of the pressurizer PORV control circuitry at least once per 31 days.
This requirement was originated in the NRC letter of July 2,1980 issuing the model Technical Specifications for the Short-Term TMI Modifications.
The original NRC requirement in the model Technical Specification called for a 31-day functional test of the PORVs.
License Change Application 69 was submitted on October 31, 1981 modifying the functional test requirement to a circuit continuity test.
Subsequent to the issuance of the Trojan Technical Specification amendment (Amendment 56, January 1981), it was determined that there was no acceptable method of performing a continuity check which does not require actual cycling of the PORVs.
Performance of this con-tinuity check without cycling the PORVs requires disabling the PORVs by pulling control fuses, lifting leads and installing jumpers, and taking resistance readings through the solenoid valve coils.
Af,er the continuity check is completed, the only assured method of verifi-cation that the valve is returned to proper service position is to functionally test the valves by actually cycling them.
This increases the probability of valve leakage and creates maintenance problems.
This LCA is submitted to modify the surveillance requirement by deleting the 31-day continuity checks and expanding the scope of the 18-month surveillance of the PORVs.
2.
Technical Specification 3.3.3.9, " Accident Monitoring Instrumenta-tion", Table 4.3-7 requires a monthly channel check of valve position indicators for the PORVs and the block valves.
The scope of the channel check for the valve position indicators is not clearly defined in the Technical Specification, which results in various interpretations of the monthly surveillance requirement.
LCA 83 Pagt 2 of 3 This LCA is submitted to clarify the scope of the channel check by adding a footnote to Table 4.3-7.
SAFETY AND ENVIRONMENTAL EVALUATIONS A.
Effect on Technical Specifications and Basis of Technical Specifications 1.
Technical Specification 4.4.3.2.I' requires the circuit continuity check of each PORV at least once in 31 days.
Currently, the PORVs are cycled every 31 days in order to verify proper service position of the valves after the circuit continuity check. This increases the probability of valve leakage and maintenance problems due to unnecessary cycling. As such, the margin of safety and the availability of the PORVs are reduced.
Deletion of the 31-day circuit continuity check will have no significant effect on Plant safety and system reliability. The 4
Action statement in Technical Specification 3.4.3.2 adequately covers the situation of inoperable PORVs by closing the block valves.
Each block valve is. demonstrated operable by stroking the valve at least once in 92 days in accordance with the Tech-nical Specifications. This is consistent with the Westinghouse PWR Standard Technical Specifications (NUREG-0452, Rev. 3,1980) which no longer includes the 31-day. channel check requirement.
Furthermore, this LCA is consistent with the proposed IST program for Trojan.
2.
The proposed change in Table 4.3-7 of Specification 3.3.3.9 is merely editorial to provide a clarification of the surveillance requirement in order to avoid unnecessary confusion.
B.
Effect on FSAR 1.
The design description of the PORVs is provided in FSAR Sections
- 5. 5.11 and 5.5.12.
However, testing of the valves is not dis-cussed in these sections and thus this LCA does not affect the FSAR. With the proposed change in this LCA, the margin of safety and Plant availability, which is adversely affected by the present Technical Specifications, will be increased. The proposed change will not introduce any new accidents or affect the results or consequences of any previously analyzed transient.
2.
The proposed change in Table 4.3-7 of Specification 3.3.3.9 will not introduce any new accidents or affect the results or conse-quences of any previously analyzed transient.
C.
Environmental Effect The proposed changes do not affect the environmental analyses in the FSAR, in the environmental report, and/or the final environ-mental impact statement. No unrevieweo environmental question exists and there is no significant adverse effect on the environment due to the praposed changes.
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l LCA 83 Prgt 3 cf 3 BASIS FOR DETERMINATION OF AMENDMENT CLASS This LCA has been determined to result in a Class III amendment in accordance with 10 CFR 170.22. This LCA involves a single issue and does not' involve a significant hazard consideration. The fee for the Class III amendment is $4,000.
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