ML042390214
| ML042390214 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Palisades, Indian Point, Catawba, Wolf Creek, Sequoyah, Surry, Vogtle, Waterford, PROJ0694  |
| Issue date: | 08/20/2004 |
| From: | Schiffley F Westinghouse Owners Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| PA-MSC-0120, WOG-04-414 WCAP-16168-NP, Rev 0 | |
| Download: ML042390214 (4) | |
Text
Domestk Members AmerenUE Callaway American Electric Power Co.
D.C. Cook 1 & 2 Arizona Public Service Co.
Palo Verde 1, 2 & 3 Constellation Energy Group Calvert Cliffs I & 2 R. E. Ginna Dominion Nuclear Connecticut Millstone 2 & 3 Dominion Virginia Power North Anna 1 & 2 Surry 1 & 2 Duke Energy Catawba I a 2 McGuire 1 & 2 Entergy Nuclear Northeast Indian Point 2 & 3 Entergy Nuclear South ANO 2 Waterford 3 Exelon Generation Company LLC Braidwood 1 8 2 Byron I & 2 FIrstEnergy Nuclear Operating Co.
Beaver Valley I & 2 FPL Group St. Lucie I & 2 Seabrook Turkey Point 3 & 4 Nuclear Management Co.
Kewaunee Palisades Point Beach I & 2 Prairie Island Omaha Public Power District Fort Calhoun Pacific Gas & Electric Co.
Diablo Canyon 1 & 2 Progress Energy H. S. Robinson 2 Shearon Hams PSEG - Nuclear Salem I & 2 South Carolina Electric & Gas Co.
V. C. Summer Southern California Edison SONGS 2 & 3 STP Nuclear Operating Co.
South Texas Project 1 & 2 Southern Nuclear Operating Co.
J. M. Farley I & 2 A W. Vogte 1 & 2 Tennessee Valley Authority Sequoyah 1 & 2 Watts Bar 1 TXU Electric Commanche Peak 1 & 2 Wolf Creek Nuclear Operating Corp.
Wolf Creek intematonalMembers Electrabel Doel 1, 2, 4 Tihange 1 & 3 Electricite de France Kansal Electric Power Co.
Mihama 1 Takahama 1 Ohi 1 &2 Korea Hydro & Nuclear Power Co.
Kori 1 -4 Ulchin 3 & 4 Yonggwang 1 - 5 British Energy pic Sizewell B NEK Kriko Spanish Utilities Asco I & 2 Vandellos 2 Almaraz 1 & 2 Ringhals AB Ringhals 2 - 4 Taiwan Power Co.
Maanshan 1 & 2 August 20, 2004 WOG-04-414 WCAP-16168-NP, Rev.0 Project Number 694 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Westinghouse Owners Group Westinghouse Owners Group Request to Withdraw WCAP-16168-NP, "Risk-Informed Extension of Reactor Vessel In-Service Inspection Interval" (PA-MSC-0120)
WCAP 16168-NP, "Risk-Informed Extension of Reactor Vessel In-Service Inspection Interval," provides the technical justification for extending the reactor vessel in-service inspection (ISI) interval from 10 to 20 years and was submitted for NRC review and approval by Reference 1. Reference 2 agreed to pay for the review fees associated with the review of WCAP-16 168-NP.
The purpose of this letter is to withdraw WCAP-16168-NP from NRC review, based on the discussions in the June 24, 2004 meeting between the Westinghouse Owners Group (WOG) and the NRC. The WOG agreed to withdraw WCAP-16168-NP based on the NRC's agreement to consider the approval of I OCFR50.55a requests that request deferring, up to 18 months, the 10 year reactor vessel ISIs currently required to be performed in the next 30 months by WOG members. The NRC requested the WOG to identify the plants and currently scheduled 10 year reactor vessel ISI dates.
Table 1 provides this requested information for WOG plants that have committed to implement WCAP-16168.
The technical approach utilized in the reactor vessel ISI interval extension program is based on a majority of the work being performed in support of another ongoing program, the Pressurized Thermal Shock (PTS) Risk Reevaluation Program, and also includes the same pilot plants evaluated in that program. The "Technical Basis for Revision of the Pressurized Thermal Shock (PTS) Screening Criteria in the PTS Rule (10 CFR 50.61)," is currently being revised and is scheduled to be completed by Nuclear Regulatory Research in December 2004. The WOG intends to resubmit
WOG-044 14 August 20, 2004 WCAP-16 168-NP for NRC review and approval in the first quarter of 2005, after the revised PTS Risk Reevaluation Program is transmitted to Nuclear Reactor Regulation, and, as such, we request that the WCAP be reviewed at that time in parallel with PTS Risk Reevaluation Program.
The use of the PTS work in the reactor vessel ISI interval extension program was recommended by the Staff during the meetings held to discuss the program. The use of the PTS work in the reactor vessel ISI interval extension program minimizes the Staff resources, since that approach must be reviewed for the PTS risk reevaluation program. Utilizing a common approach in both programs ensures the most efficient use of both the NRC and industry resources for both of these efforts.
WCAP-16168-NP concluded that extending the reactor vessel ISI interval from 10 to 20 years satisfies all of the criteria contained in Regulatory Guide 1.174, is consistent with the approach used for the ongoing PTS risk re-evaluation program, and results in a reduction in radiation exposure associated with performing the inspections.
If you have any questions regarding this request, please feel free to call me at 630-657-3897 or Mr. Jim Andrachek (Westinghouse) at 412-374-5018.
Very truly yours, Ak 2A-Frederick P. "Ted" Schiffley, II Chairman, Westinghouse Owners Group mjl
References:
- 1. Westinghouse Owners Group Letter (F.P. Schiffley) to USNRC, Chief, Information Management Branch, "Transmittal of WCAP-16168, Rev. 0 (Non-Proprietary) "Risk-Informed Extension of Reactor Vessel In-Service Inspection Interval," WOG-03-565, October 31, 2003.
- 2. Westinghouse Owners Group Letter (F.P. Schiffley) to USNRC, Chief, Information Management Branch, "Request for NRC Review of WCAP-16168, Rev. 0 (Non-Proprietary) "Risk-Informed Extension of Reactor Vessel In-Service Inspection Interval,"
WOG-04-075, February 13, 2004.
WOG-04-414 August 20, 2004 cc:
WOG Executive Committee WOG Steering Committee WOG Management Committee WOG Analysis Subcommittee WOG Materials Subcommittee WOG Risk Management Subcommittee WOG Licensing Subcommittee H. Berkow, USNRC G. Shukla, USNRC (via Federal Express)
WOG Project Management Office J. D. Andrachek, W - Pittsburgh G. G. Ament, W - Pittsburgh P. J. Kotwicki, W - Pittsburgh C. L. Boggess, W - Pittsburgh B. A. Bishop, W - Pittsburgh N. A. Palm, W - Pittsburgh
Table 1-WOG Plant 10 Year ISI Schedules (Applicable to WOG plants that have committed to implement WCAP-16168)
Plant/Unit Currently Date when 10 Amount of time that scheduled 10 year ISI must the 12 month extension year ISI performed w/o falls short of the next 12 month RFO (months) extension Catawba Unit 2 Fall 2004 August 2006 1 (Fall 2007)
Indian Point Unit 2 Fall 2004 April 2006 14 - (Spring 2008)
Surry Unit 1 Fall 2004*
October 2003 N/A Sequoyah Unit 2 Spring 2005 December 2005 0 - (Fall 2006)
Surry Unit 2 Spring 2005*
May 2004 N/A Wolf Creek Spring 2005 September 2005 2 - (Fall 2006)
Palisades Spring 2006+
December 2005 9 - (Fall 2007)
Waterford Unit 3 Fall 2006 Fall 2006 11 - (Spring 2008)
Vogtle Unit 1 Fall 2006 May 2007 0 - (Spring 2008)
Beaver Valley Unit 2 Fall 2006 August 2008 1 (Fall 2009)
Sequoyah Unit I Spring 2006#
December 2005 9 - (Fall 2007)
- 12 month extension utilized
+ Approximately 6 months of the 12 month extension utilized
- 5.5 months of the 12 month extension utilized RFO = Refueling Outage WOG-04-4 14