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Category:E-Mail
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ML19011A3512019-01-11011 January 2019
NRR E-mail Capture - Request for Additional Information DC Cook Unit 1 Leak Before Break Amendment
ML19009A5402019-01-0909 January 2019
NRR E-mail Capture - D.C. Cook Nuclear Plant Unit Nos. 1 and 2 - Acceptance Review for LAR to Revise Battery Monitoring and Maintenance TS
ML18313A0802018-11-0808 November 2018
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ML18275A0532018-10-0101 October 2018
NRR E-mail Capture - D.C. Cook Nuclear Plant Unit Nos. 1 and 2 - Acceptance Review for LAR to Revise Battery Monitoring and Maintenance TS
2023-02-21
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NRR-PMDAPEm Resource From: Chawla, Mahesh Sent: Thursday, November 20, 2014 12:53 PM To: hletheridge@aep.com Cc: mkscarpello@aep.com; Hamzehee, Hossein; Biro, Mihaela; Gennardo, David; Pelton, David
Subject:
Request for Additional Information - Donald C. Cook Units 1 and 2 - LAR - To revise Technical Specification 5.5.14, "Containment Leakage Rate Testing Program" - MF3568 and MF3569 By letter dated March 7, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14071A419), as supplemented by letter dated September 30, 2014 (ADAMS Accession No. ML14275A454), Indiana Michigan Power Company (I&M) requested amendments to Operating Licenses DPR-58 and DPR-74 in the form of changes to the Technical Specifications (TS) for Donald C. Cook Nuclear Plant Units 1 and 2, respectively. The license amendment request (LAR) proposes a change to TS 5.5.14, Containment Leakage Rate Testing Program, to allow a permanent extension of the Type A primary containment integrated leak rate test (ILRT) frequency from three in 10 years to once in 15 years and extension of the Type C containment isolation valve leakage test frequency to 75 months. The NRCs Probabilistic Risk Assessment Licensing Branch has reviewed the risk-related information in the license amendment request and identified areas where additional information is needed to complete its review. The request for additional information is provided as below: Please arrange a teleconference with the NRC staff, in case you would like to further discuss this request.
Request for Additional Information Regarding Donald C. Cook Nuclear Plant, Units 1 and 2 Request for Permanent Extension of Containment Type A and C Leak Rate Test Frequencies
- 1. In the safety evaluation report for Electric Power Research Institute (EPRI) Technical Report (TR) 1009325, Revision 2, Risk Impact Assessment of Extended Integrated Leak Rate Testing Intervals, the Nuclear Regulatory Commission (NRC) staff, in part, stated that for licensee requests for a permanent extension of the integrated leak rate testing (ILRT) surveillance interval to 15 years
[c]apability category I of ASME RA-Sa-2003 shall be applied as the standard, since approximate values of [core damage frequency (CDF)] and [large early release frequency (LERF)] and their distribution among release categories are sufficient for use in the EPRI methodology.
Enclosure 6 to the LAR states that peer reviews of the PRA model were performed in 2001 and 2009.
Table 1.0 provided in Enclosure 6 to the LAR describes the status of the facts and observations (F&Os) from these peer reviews. Enclosure 6 to the LAR further states that a gap assessment was performed in 2012, which, per Section 4.6.2 of Enclosure 2 to the LAR, was performed against Regulatory Guide (RG) 1.200, Revision 2. Section 4.6.1 of Enclosure 2 to the LAR additionally states that a new Level 2 model was used to perform the plant-specific risk assessment and that this Level 2 model was peer reviewed in 2013 against ASME/ANS PRA Standard RA-Sa-2009 and RG 1.200, Revision 2.
- a. Enclosure 6 to the LAR states that the 2012 gap assessment identified 68 supporting requirements (SRs) with potential gaps. Provide a list of any SRs considered not met at Capability Category I.
Justify why not meeting each Capability Category I requirement will have no impact on the ILRT extension application.
- b. Section 4.6.2 of Enclosure 2 to the LAR states that the 2013 focused-scope peer review of the Level 2 model identified four SRs that were Not Met. Provide the F&Os associated with these SRs and justify why not meeting each Capability Category I requirement will have no impact on the ILRT extension application 1
Mahesh Chawla Project Manager Phone: 301-415-8371 Fax: 301-415-1222 mahesh.chawla@nrc.gov 2
Hearing Identifier: NRR_PMDA Email Number: 1714 Mail Envelope Properties (Mahesh.Chawla@nrc.gov20141120125200)
Subject:
Request for Additional Information - Donald C. Cook Units 1 and 2 - LAR - To revise Technical Specification 5.5.14, "Containment Leakage Rate Testing Program" - MF3568 and MF3569 Sent Date: 11/20/2014 12:52:35 PM Received Date: 11/20/2014 12:52:00 PM From: Chawla, Mahesh Created By: Mahesh.Chawla@nrc.gov Recipients:
"mkscarpello@aep.com" <mkscarpello@aep.com>
Tracking Status: None "Hamzehee, Hossein" <Hossein.Hamzehee@nrc.gov>
Tracking Status: None "Biro, Mihaela" <Mihaela.Biro@nrc.gov>
Tracking Status: None "Gennardo, David" <David.Gennardo@nrc.gov>
Tracking Status: None "Pelton, David" <David.Pelton@nrc.gov>
Tracking Status: None "hletheridge@aep.com" <hletheridge@aep.com>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 3550 11/20/2014 12:52:00 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received:
