ML16312A003

NRR E-mail Capture - Request for Additional Information (RAI) - Relief Request 14R-03

ML16312A003
Person / Time
Site:	Wolf Creek
Issue date:	11/04/2016
From:	Balwant Singal Plant Licensing Branch IV
To:	Muilenburg W Wolf Creek
References
MF8456
Download: ML16312A003 (3)

Text

NRR-PMDAPEm Resource From: Singal, Balwant Sent: Friday, November 04, 2016 1:39 PM To: Muilenburg William T (wimuile@WCNOC.com)

Cc: Hafenstine Cynthia R; Alley, David; Pascarelli, Robert; Collins, Jay; Cumblidge, Stephen; Tsao, John

Subject:

Request for Additional Information (RAI) - Relief Request 14R-03 (CAC No. MF8456)

Please note that the ADAMS Accession No. quoted was not correct. We do not have ADAMS Accession No.

for letter dated Nov. 1, 2016 at this time.

Thanks.

By letter dated November 1, 2016 (Agencywide Documents Access and Management System (ADAMS) accession No. ML16300A214), Wolf Creek Nuclear Operating Corporation (the licensee) submitted Relief Request I4R-03 for the alternate examination of all 78 control rod drive mechanism (CRDM) nozzle penetration welds at the Wolf Creek Generating Station. The licensee proposed (a) to perform a volumetric leak path assessment of each penetration nozzle in lieu of the surface leak path assessment required by Paragraph -

3200(b) of ASME Code Case N-729-1, and (b) if an unacceptable indication by the leak path assessment or volumetric exam is identified, the licensee will revert to the requirements of Code Case N-729-1 and Title 10 of the Code of Federal Regulations (10 CFR) Paragraph 50.55a(g)(6)(ii)(D). The licensee made this request in accordance with the requirements of 10 CFR 50.55a(z)(2), such that compliance with the specified requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.

The U.S. Nuclear Regulatory Commission (NRC) staff needs the following additional information to complete its review. The draft request for additional information (RAI) was discussed with your staff on November 2, 2016. Please treat this e-mail as formal transmittal of RAI. Your expedited response to the RAI is requested so that the NRC staff can complete its review and process the verbal authorization, as requested by you, based on the results of the review.

Request for Additional Information

1. On page 4 of 8 of Attachment 1 to letter dated November 1, 2016, the licensee states that the radiological dose estimated for the eddy current surface examination of 66 of the penetration welds would be 500 mRem. What is the total estimated radiological dose for the performance of the eddy current surface examination on all 78 of the penetration welds?

Please let me know if there are any additional questions.

Thanks.

Balwant K. Singal Senior Project Manager (Diablo Canyon and Wolf Creek)

Nuclear Regulatory Commission Division of Operating Reactor Licensing Balwant.Singal@nrc.gov Tel: (301) 415-3016 Fax: (301) 415-1222 1

2 Hearing Identifier: NRR_PMDA Email Number: 3145 Mail Envelope Properties (Balwant.Singal@nrc.gov20161104133900)

Subject:

Request for Additional Information (RAI) - Relief Request 14R-03 (CAC No.

MF8456)

Sent Date: 11/4/2016 1:39:05 PM Received Date: 11/4/2016 1:39:00 PM From: Singal, Balwant Created By: Balwant.Singal@nrc.gov Recipients:

"Hafenstine Cynthia R" <cyhafen@WCNOC.com>

Tracking Status: None "Alley, David" <David.Alley@nrc.gov>

Tracking Status: None "Pascarelli, Robert" <Robert.Pascarelli@nrc.gov>

Tracking Status: None "Collins, Jay" <Jay.Collins@nrc.gov>

Tracking Status: None "Cumblidge, Stephen" <Stephen.Cumblidge@nrc.gov>

Tracking Status: None "Tsao, John" <John.Tsao@nrc.gov>

Tracking Status: None "Muilenburg William T (wimuile@WCNOC.com)" <wimuile@WCNOC.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 2497 11/4/2016 1:39:00 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: ZZZ