Letter Sequence Other |
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MONTHYEARML0235800042002-12-23023 December 2002
Memorandum to Richard Laufer, Integrated Leak Rate Test (ILRT) Extension Request
Project stage: Other
ML0306408802003-03-0505 March 2003
Issuance of Amendment Nos. 254 & 134, Respectively, Revising TS, Section 6.17 to Allow a One-Time 5-Year Extension to the Current 10-Year Test Interval for the Containment Integrated Leak Rate Test
Project stage: Approval
ML0306509012003-03-0505 March 2003
TSs Pages Amendments 254 & 134
Project stage: Other
2002-12-23
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Category:Memoranda
MONTHYEARML22019A2652022-01-27027 January 2022
Us NRC Staff Review of Documentation Provided by Firstenergy Nuclear Operating Co. for Beaver Valley, Units 1&2 Concerning Resolution of Generic Letter 2004-02 - Potential Impact of Debris Blockage on Emergency Recirculation During Design B
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Quarterly Report on the Status of Public Petitions Under Title 10 of the Code of Federal Regulations, Section 2.206 - April 1 to June 30, 2019
ML19085A5132019-04-0101 April 2019
Review of Updated Final Safety Analysis Report, Revision 23
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Bv Annual Assessment Meeting Summary and Attendance List 2018
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Notice of Public Meeting on March 27, 2018
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ML16224A7652016-10-20020 October 2016
Review of Updated Final Safety Analysis Report, Revision 22
ML15201A4812015-07-20020 July 2015
Notice of Forthcoming Closed Meeting to Discuss Basin-Wide Probable Maximum Flood Analysis for Beaver Valley Power Station, Units 1 and 2
ML15182A1912015-07-16016 July 2015
Annual Financial Test for a Parent Company Guarantee Given by Firstenergy Solutions Corporation and Firstenergy Corporation
ML15135A2982015-05-21021 May 2015
Summary of April 28, 2015, Meeting Between Representatives of the U.S. Army Corps of Engineers, Nuclear Regulatory Commission, and First Energy Nuclear Operating Co. to Discuss Flooding Analysis Associated with Beaver Valley Power Station,
ML15110A4062015-04-23023 April 2015
Notice of Closed Meeting with FENOC on Beaver Valley
ML15016A4392015-01-20020 January 2015
Draft Request for Additional Information
ML14195A0742014-07-14014 July 2014
Memoranda to S. Wastler Technical Assistance Request - Review of Physical Security Plan for the Beaver Valley Power Station (TAC No. L24936)
IR 05000334/20004122014-07-0808 July 2014
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ML14189A1192014-07-0808 July 2014
NRC Staff'S Toledo Edison Spot-Check Review of Toledo Edison Company'S Ownership Interest in Beaver Valley Nuclear Power Station, Unit 2, Docket No. 50000412, on June 10, 2014-Finding of No Potential Issues
ML14161A1482014-06-17017 June 2014
Notice of Forthcoming Closed Meeting to Discuss Dam Failure Analysis for Beaver Valley Power Station, Units 1 and 2
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Electronic Transmission, Draft Request for Additional Information Regarding the 2013 Decommissioning Funding Status Report
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Electronic Transmission, Draft Request for Additional Information Regarding 2012 Steam Generator Tube Inspection Reports
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Rai'S Following Ifib Analysis of Fenoc'S 2013 Decommissioning Funding Status Report for Beaver Valley 1 and 2
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Summary of the May 2010 Annual Assessment Open-House Public Meeting
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Docketing of NRC Teleconference Notes Pertaining to the License Renewal of the Beaver Valley Power Station, Units 1 and 2
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2022-01-27
[Table view] |
Text
December 23, 2002 MEMORANDUM TO: Richard J. Laufer, Chief, Section 1 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Robert Clark, Project Manager, Section 1 /RA/
Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF CONFERENCE CALL HELD ON NOVEMBER 21, 2002, WITH BEAVER VALLEY POWER STATION, UNITS 1 AND 2, RE:
INTEGRATED LEAK RATE TEST (ILRT) EXTENSION REQUEST (TAC NOS. MB6660 AND MB6661)
On November 21, 2002, the Nuclear Regulatory Commission (NRC) staff held a conference call with Beaver Valley Power Station (BVPS), Units 1 and 2, personnel and their contractor, to discuss the BVPS ILRT license extension request, and three major concerns with BVPSs risk analysis in support of this request. The key points discussed were:
- 1. The licensee submitted separate calculations for BVPS Units 1 and 2 using two different methodologies. The first methodology used was the "Joint Applications Report for Containment Integrated Leak Rate Test Interval Extension, WCAP-15691. This methodology has not been approved by the staff, and in fact, the NRC staff has proposed rejecting it. The second methodology used was the same methodology used for the Crystal River ILRT extension request, which was approved by the NRC. The staff indicated during the call that it would rely on the calculations performed using the Crystal River methodology due to the issues with WCAP-15691.
- 2. The licensee used the RADTRAD code (typically used for design bases accident/bounding analyses) for estimating dose consequences, rather than a code like MACCS2 (typically used for risk assessments/best-estimate analyses). This results in dose estimates of about 2 - 3 orders of magnitude higher than the best-estimate codes relied on for most other ILRT requests. The differential between the doses for the "Intact Containment" and the "Bypass" release classes is 3 orders of magnitude in the BVPS submittal versus 4 - 5 orders of magnitude if a best-estimate code were used.
This biases the results, and understates the risk impact of the ILRT extension. The staff recommended that the licensee consider using dose-consequence estimates from the plant-specific Probability Risk Assessment if available, applicable dose estimates from the NUREG-1150 study, or the November 15, 2001, Nuclear Energy Institute (NEI) interim guidance on ILRT extension requests.
CONTACT: R. Clark, (301) 415-2297
R. Laufer 3. The staff noted that the Crystal River methodology, when applied to BVPS, resulted in a negative frequency for Class 1 (Intact Containment) sequences. The staff questioned the technical adequacy of the analysis given this anomaly, and suggested that the licensee further consider the November 30, 2001, NEI supplemental guidance on ILRT extensions in estimating the Class 3a and 3b frequencies, and in deciding the sequence classes from which the Class 3a and 3b frequencies should be subtracted.
- 4. The staff noted that the licensees response to previous questions the NRC staff asked of other licensees did not provide any substantive information regarding the risk impact of corrosion-induced leakage. The staff indicated that we are interested in an assessment of the likelihood and risk-implications of degradation-induced leakage occurring and going undetected in visual examinations during the extended test interval.
The staff noted that Calvert Cliffs and other licensees have provided such assessments, and suggested that the licensee consider a similar analysis for BVPS Units 1 and 2.
The licensee indicated that they would discuss these issues further with their contractor and decide on a course of action. The staff suggested that further information be submitted as a license amendment supplement, without the need for an RAI.
Docket Nos. 50-334 and 50-412
ML023580004 NRR-106 OFFICE PD1-1/PM PD1-1/LA PD1-1/SC NAME RClark:rkb MOBrien RLaufer DATE 12/17/02 12/12/02 12/12/02 DOCUMENT NAME: G:\PDI-1\Beaver 1&2\ILRT Meeting Summary R1.wpd