DCL-05-111, Withdrawal Request for Approval of Extreme Growth Method
| ML052760158 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/22/2005 |
| From: | Oatley D Pacific Gas & Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| DCL-05-111 | |
| Download: ML052760158 (2) | |
Text
Pacific Gas and Electric Company David H. Oatley Diablo Canyon Power Plant Vice President and PO. Box 56 General Manager Avila Beach, CA 93424 September 22, 2005 805.545.4350 Fax: 805.545.4234 PG&E Letter DCL-05-1 11 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Withdrawal of Request for Approval of Extreme Growth Method
Dear Commissioners and Staff:
Pacific Gas and Electric Company (PG&E) Letter DCL-04-028, dated March 18, 2004, submitted License Amendment Request (LAR) 04-01, "Revised Steam Generator Voltage-based Repair Criteria Probability of Detection Method for DCPP Units 1 and 2." LAR 04-01 requested approval to use the probability of prior cycle detection (POPCD) method on a permanent basis for all remaining cycles for Diablo Canyon Power Plant (DCPP) Units 1 and 2 until steam generator replacement. In DCL-04-028, PG&E stated that upon NRC approval to use the POPCD method, PG&E would adopt the Electric Power Research Institute (EPRI) outlier (extreme) growth method for application coincident with the use of the POPCD method.
Subsequently, in PG&E Letter DCL-04-117, dated September 17, 2004, "Response to August 24, 2004, NRC Request for Additional Information Regarding License Amendment Request 04-01, 'Revised Steam Generator Voltage-based Repair Criteria Probability of Detection Method for DCPP Units 1 and 2,"' PG&E stated that it did not need approval of the EPRI extreme growth method for Unit 2 Cycle 13 based on the NRC's acceptance of PG&E's exclusion criteria for the extreme growth rate observed in Unit 2 Refueling Outage No. 11, and the extreme growth method could be approved at a later time.
On October 28, 2004, the NRC issued License Amendments 177 (Unit 1) and 179 (Unit 2), approving LAR 04-01, without completing its review.of the extreme growth method as submitted in LAR 04-01.
PG&E has determined that extreme growth at DCPP has a very low probability of occurrence, largely due to increased Plus Point inspections and conservative preventive plugging criteria. Therefore, PG&E withdraws its request for NRC approval of the extreme growth method as submitted in LAR 04-01.
A member of the STARS (Strategic Teaming and Resource Sharing)
Alliance Callaway
- Comanche Peak
- Diablo Canyon
- Palo Verde
- South Texas Project
- Wolf Creek
Document Control Desk September 22, 2005 Page 2 PG&E Letter DCL-05-1 11 If you have any questions, or require additional information, please contact Stan Ketelsen at (805) 545-4720.
Sin atn David H. Oatley Vice President and General Manager jerl/3664 cc:
Edgar Bailey, DHS Terry W. Jackson Bruce S. Mallett Girija'S. Shukla Diablo Distribution A member of the STARS (Strategic Teaming and Resource Sharing)
Alliance Callaway
- Comanche Peak
- Diablo Canyon
- Palo Verde
- South Texas Project
- Wolf Creek