Letter Sequence RAI |
|---|
EPID:L-2018-LLA-0054, Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping (Approved, Closed) |
|
MONTHYEARML18072A0102018-01-31031 January 2018, 7 March 2018
Request for Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping
Project stage: Request
ML18072A0132018-01-31031 January 2018
WCAP-18295-NP, Revision 0, Technical Justification for Eliminating Accumulator Line Rupture as the Structural Design Basis, Using Leak-Before-Break Methodology.
Project stage: Request
ML18072A0142018-01-31031 January 2018
WCAP-18302-NP, Revision 0, Technical Justification for Eliminating Residual Heat Removal Line Rupture as the Structural Design Basis, Using Leak-Before-Before Break Methodology.
Project stage: Request
ML18072A0152018-01-31031 January 2018
WCAP-18309-NP, Revision 0, Technical Justification for Eliminating Safety Injection Line Rupture as the Structural Design Basis Using Leak-Before-Break Methodology.
Project stage: Request
ML18075A1142018-03-26026 March 2018
Request for Withholding Information from Public Disclosure
Project stage: Withholding Request Acceptance
ML18096A7642018-04-0606 April 2018
NRR E-mail Capture - Donald C. Cook, Unit 1 - Acceptance Review for Application of Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping
Project stage: Acceptance Review
ML18204A3722018-07-19019 July 2018
NRR E-mail Capture - D.C. Cook Unit No. 1 - RAI for Leak-Before-Break LAR
Project stage: RAI
ML18263A1542018-09-14014 September 2018
NRR E-mail Capture - D.C. Cook Unit No. 1 - RAI for Leak-Before-Break LAR
Project stage: RAI
ML19011A3512019-01-11011 January 2019
NRR E-mail Capture - Request for Additional Information DC Cook Unit 1 Leak Before Break Amendment
Project stage: RAI
ML19072A1432019-03-12012 March 2019
NRR E-mail Capture - Resubmitted: Draft Request for Additional Information DC Cook Unit 1 - Leak-Before-Break LAR
Project stage: Draft RAI
ML19084A0002019-03-20020 March 2019
NRR E-mail Capture - Resubmitted: Draft Request for Additional Information DC Cook Unit 1 - Leak-Before-Break LAR
Project stage: Draft RAI
ML19170A3622019-08-0101 August 2019
Issuance of Amendment Approval of Application of Proprietary Leak-Before-Break Methodology for Reactor Coolant System Small Diameter Piping
Project stage: Approval
2018-09-14
[Table View] |
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[Table view] |
Text
NRR-DMPSPEm Resource From: Dietrich, Allison Sent: Friday, September 14, 2018 2:43 PM To: Helen L Levendosky Cc: Joe Tanko (jmtanko@aep.com)
Subject:
D.C. Cook Unit No. 1 - RAI for Leak-Before-Break LAR (EPID L-2018-LLA-0054)
Attachments: DC Cook Unit 1 RAI for LBB LAR.pdf By letter dated March 7, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML18072A012), Indiana Michigan Power Company (I&M) submitted a license amendment request (LAR) for the Donald C. Cook Nuclear Plant (CNP), Unit No. 1. The proposed amendment would allow for the application of leak-before-break methodology to piping for the accumulator, residual heat removal, and safety injection systems at CNP, Unit No. 1.
The U.S. Nuclear Regulatory Commission staff has reviewed your submittal. The staff has determined that additional information is needed in order to complete the review, as described in the attached request for additional information (RAI). The draft RAI was sent to I&M via electronic mail on August 29, 2018. A clarification telephone conference was held on September 11, 2018. Please respond to this RAI by October 15, 2018.
Please feel free to contact me if you have any questions or concerns.
Sincerely, Allison W. Dietrich, Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 301-415-2846 1
Hearing Identifier: NRR_DMPS Email Number: 570 Mail Envelope Properties (Allison.Dietrich@nrc.gov20180914144300)
Subject:
D.C. Cook Unit No. 1 - RAI for Leak-Before-Break LAR (EPID L-2018-LLA-0054)
Sent Date: 9/14/2018 2:43:20 PM Received Date: 9/14/2018 2:43:00 PM From: Dietrich, Allison Created By: Allison.Dietrich@nrc.gov Recipients:
"Joe Tanko (jmtanko@aep.com)" <jmtanko@aep.com>
Tracking Status: None "Helen L Levendosky" <hllevendosky@aep.com>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 1135 9/14/2018 2:43:00 PM DC Cook Unit 1 RAI for LBB LAR.pdf 56015 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received:
REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST FOR APPLICATION OF LEAK-BEFORE-BREAK EVALUATIONS FOR ACCUMULATOR, SAFETY INJECTION, AND RESIDUAL HEAT REMOVAL PIPING DONALD C. COOK NUCLEAR PLANT, UNIT NO. 1 DOCKET NO. 50-315 By letter dated March 7, 2018 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML18072A012), Indiana Michigan Power Company (I&M, the licensee) submitted a license amendment request (LAR) that would allow for the application of leak-before-break (LBB) evaluations for accumulator piping, safety injection (SI) piping, and residual heat removal (RHR) piping at the Donald C. Cook Nuclear Plant (CNP), Unit No. 1. The NRC staff has determined that additional information is necessary in order to complete its review.
Requests for Additional Information (RAIs) 1 through 6 were sent to the licensee on July 19, 2018 (ADAMS Accession No. ML18204A372). RAI 7 is provided below.
RAI 7
The regulatory guidelines in Regulatory Guide 1.45, Guidance on Monitoring and Responding to Reactor Coolant System Leakage (ADAMS Accession No. ML073200271) state that all monitoring systems referenced in the technical specifications should respond to a leakage increase of 1 [gallon per minute (gpm)] (3.8 [liters per minute]) in 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or less.
In its application, the licensee stated, A CNP leakage detection capability calculation demonstrates the 0.8 gpm leak detection capability is valid for leaks in the Accumulator, RHR, and SI piping. As such, the 0.8 gpm leak detection capability is the basis for LBB evaluation of the Accumulator, RHR, and SI lines with no response time assumed.
The NRC staff considers response time to include both transport response time and detector response time. The application is not clear what is meant by no response time assumed.
Clarify the assumption of no response time assumed in the calculation described above, and its effect on the calculation results and acceptability.
