ML15342A444
| ML15342A444 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/08/2015 |
| From: | Mozafari B Plant Licensing Branch 1 |
| To: | Reynolds R Exelon Corp |
| References | |
| MF5900 | |
| Download: ML15342A444 (3) | |
Text
1 NRR-PMDAPEm Resource From:
Mozafari, Brenda Sent:
Tuesday, December 08, 2015 3:16 PM To:
'Ronnie.Reynolds@exeloncorp.com'
Subject:
Draft RAI #1 from CAC MF5900 Ron as discussed today, By letter dated March 23, 2015, (Agencywide Documents Access and Management System (ADAMS)
Accession No. ML15082A368) Exelon Generation Company, LLC (Exelon) requested an amendment to the Technical Specifications for Nine Mile Point Nuclear Station, Unit 2 (NMP2). Specifically, the proposed change would relocate TS Table 3.6.1.3-1, Secondary Containment Bypass Leakage Paths Leakage Rate Limits, and references to the Table to the Technical Requirements Manual. Exelon stated that the changes follow the guidance provided in Generic Letter 91-08, Removal of Component Lists from Technical Specifications.
The NRC staff has determined that the enclosed request for additional information (RAI) is necessary to complete its review of the amendment request.
The enclosed RAI was discussed with your staff on December 8, 2015, and it was agreed that your response would be provided within 30 days from the date our call and draft RAI email dated December 8, 2015. Do not hesitate to contact me at 301-415-2020 if any clarification call is necessary.
REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION EXELON GENERATION COMPANY, LLC NINE MILE POINT NUCLEAR STATION, UNIT 2 In a letter dated March 23, 2015, Exelon Generation Company, LLC (Exelon) requested an amendment to the Technical Specifications for Nine Mile Point Nuclear Station, Unit 2 (NMP2). Specifically, the proposed change would relocate TS Table 3.6.1.3-1, Secondary Containment Bypass Leakage Paths Leakage Rate Limits, and references to the Table to the Technical Requirements Manual. Exelon stated that the changes follow the guidance provided in Generic Letter 91-08, Removal of Component Lists from Technical Specifications.
The NRC staff has determined that the following additional information is necessary in order to complete its review of the amendment request.
RAI STSB-1:
In the existing NMP2 TS, Table 3.6.1.3-1 specifies a numerical value for allowable leakage for each leakage path in standard cubic feet per hour. Surveillance Requirement (SR) 3.6.1.3.11 states:
Verify the leakage rate for the secondary containment bypass leakage paths is within the limits of Table 3.6.1.3-1 when pressurized to 40 psig.
The proposed change is deletion of Table 3.6.1.3-1 and revision of SR 3.6.1.3.11 to state:
Verify the leakage rate for the secondary containment bypass leakage paths is within the limits when pressurized to 40 psig.
2 The NRC staff requests additional information to explain why a numerical value limit on the secondary containment bypass leakage is not retained within the proposed SR 3.6.1.3.11 itself. Typically, the safety analysis for a facility assumes a specific amount of bypass leakage when calculating dose consequences. This leakage limit is reflected in the TS to ensure operation within the bounds of the safety analysis.
The regulation at 10 CFR 50.36(c)(3) requires TSs to include items in the category of surveillance requirements, which are requirements relating to test, calibration, or inspection to assure that the necessary quality of systems and components is maintained, that facility operation will be within safety limits, and that the Limiting Conditions for Operations will be met. The leakage limit for the pathways to be considered operable must be specified in the TS.
Brenda L. Mozafari Senior Project Manager, NRR/DORL U.S. Nuclear Regulatory Commission Nine Mile Point 1 and 2 Power Plants 301-415-2020 email: brenda.mozafari@nrc.gov
Hearing Identifier:
NRR_PMDA Email Number:
2539 Mail Envelope Properties (Brenda.Mozafari@nrc.gov20151208151500)
Subject:
Draft RAI #1 from CAC MF5900 Sent Date:
12/8/2015 3:15:32 PM Received Date:
12/8/2015 3:15:00 PM From:
Mozafari, Brenda Created By:
Brenda.Mozafari@nrc.gov Recipients:
"'Ronnie.Reynolds@exeloncorp.com'" <Ronnie.Reynolds@exeloncorp.com>
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Files Size Date & Time MESSAGE 3568 12/8/2015 3:15:00 PM Options Priority:
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