ML22166A411
| ML22166A411 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 06/15/2022 |
| From: | Robert Kuntz NRC/NRR/DORL/LPL3 |
| To: | Kivi J Northern States Power Company, Minnesota |
| References | |
| Download: ML22166A411 (3) | |
Text
From:
Kuntz, Robert Sent:
Wednesday, June 15, 2022 2:11 PM To:
Kivi, Jeffrey L.
Cc:
Scott, Sara
Subject:
Request for Additional Information RE: Prairie Island Nuclear Generating Plant, Unit 2, Alternative RR-08, PIV Leakage Mr. Kivi, By request dated February 8, 2022 (Agencywide Documents Access and Management System Accession Nos. ML22039A340, and ML22039A341), Northern States Power Company (NSPM),
a Minnesota corporation doing business as Xcel Energy (Xcel), submitted alternative request RR-08 for evaluation and monitoring plan for leakage past a pressure isolation valve (PIV) in lieu of American Society of Mechanical Engineers (ASME) Operation and Maintenance of Nuclear Power Plants (OM Code), Requirement ISTC-3630(f) for Prairie Island Nuclear Generating Plant, Unit 2.
The following requests for additional information (RAI) is needed for the Nuclear Regulatory Commission (NRC) staff to complete its review. During a clarification discussion held on June 15, 2022 a 30 day response was agreed upon. Therefore, the NRC staff anticipates a response to this RAI by July 15, 2022.
Robert Kuntz Senior Project Manager NRC/NRR/DORL/LPL3 REQUEST FOR ADDITIONAL INFORMATION PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNIT 2 ALTERNATIVE RR-08 RELATED TO PRESSURE ISOLATION VALVE MONITORING AND TESTING EMIB-RAI-1 Requirement:
ASME OM ISTC-3630(e) requires that leakage rate measurements shall be compared with the permissible leakage rates.
Issue:
Prairie Island Nuclear Generating Plant, Unit 2 Alternative Request RR-08, Section Reason for Request states that 2SI-6-4 failed the IST leakage rate testing performed with a leakage rate approximated to be 5.9 gallons per minute which is in excess of the 5 gallons per minute permissible leakage rate. Alternative RR-08 section Full Description of Proposed Alternative
requests that in lieu of repair and replacement of 2SI-6-4 for the period of relief, a monitoring plan with the ability to evaluate increased accumulator leakage will be performed.
Request:
Alternative Request RR-08 only provides the leakage information of valve 2SI-6-4 for October 24, 2021. For the NRC staff to evaluate the proposal to implement a monitoring plan in lieu of repair/replacement of the valve, provide the remaining historical leakage data for the valve 2SI-6-4.
Hearing Identifier:
NRR_DRMA Email Number:
1672 Mail Envelope Properties (SA9PR09MB4640EB170669E8BBC346EE2B99AD9)
Subject:
Request for Additional Information RE: Prairie Island Nuclear Generating Plant, Unit 2, Alternative RR-08, PIV Leakage Sent Date:
6/15/2022 2:10:57 PM Received Date:
6/15/2022 2:10:00 PM From:
Kuntz, Robert Created By:
Robert.Kuntz@nrc.gov Recipients:
"Scott, Sara" <sara.scott@xcelenergy.com>
Tracking Status: None "Kivi, Jeffrey L." <jeffrey.l.kivi@xcelenergy.com>
Tracking Status: None Post Office:
SA9PR09MB4640.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2242 6/15/2022 2:10:00 PM Options Priority:
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