ML15246A142
| ML15246A142 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/27/2015 |
| From: | Clark G Dominion, Dominion Nuclear Connecticut |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 15-443 | |
| Download: ML15246A142 (4) | |
Text
Dominion Nuclear Connecticut, Inc.
5000 Dominion Boulevard, Glen Allen, VA 23060 Domi***nion Web Address: www.dom.com August 27, 2015 U.S. Nuclear Regulatory Commission Serial No.15-443 Attention: Document Control Desk NLOSIWDC R0 Washington, DC 20555 Docket No.
50-423 License No.
NPF-49 DOMINION NUCLEAR CONNECTICUT. INC.
MILLSTONE POWER STATION UNIT 3 SUPPLEMENT TO LICENSE AMENDMENT REQUEST TO REVISE SURVEILLANCE REQUIREMENT 4.4.4.2. REACTOR COOLANT SYSTEM RELIEF VALVES In a letter dated October 14, 2014, Dominion Nuclear Connecticut, Inc. (DNC) submitted a license amendment request (LAR) to revise Technical Specification (TS) 3/4.4.4, Reactor Coolant System Relief Valves, for Millstone Power Station Unit 3 (MPS3). The proposed change would revise Surveillance Requirement (SR) 4.4.4.2 to remove the requirement to perform the surveillance for a pressurizer power-operated relief valve (PORV) block valve that is being maintained closed in accordance with TS 3.4.4 Action a.
The marked-up TS Bases page related to the change was provided in the October 14, 2014 LAR for information only. Upon further review of the proposed TS Bases wording for SR 4.4.4.2, DNC has decided to revise the wording to exactly match the wording in the Westinghouse Standard TS (i.e., NUREG-1431) Bases for the applicable SR. The word "Operating" in the last sentence of the proposed TS Bases paragraph will be changed to "Opening." The attachment to this letter provides the revised marked-up TS Bases page which will replace the TS Bases page provided in the October 14, 2014 LAR. The change to the TS Bases page will be incorporated in accordance with the TS Bases Control Program after the LAR is approved.
Should you have any questions in regard to this submittal, please contact Wanda Craft at (804) 273-4687.
Sincerely, Gianna C. Clark Vice President - Nuclear Support Services COMMONWEALTH OF VIRGINIA)
COUNTY OF HENRICO)
The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Gianna C.
Clark who is Vice President - Nuclear Support Services of Dominion Nuclear Connecticut, Inc. She has affirmed before me that she is duly authorized to execute and file the foregoing document in behalf of that Company, and that the statements in the document are true to the best of her knowledge and belief.
Acknowledged before me this t'7day of b,
21.,-
Notary Public arl SCommonwealth of Virginia MyCommission Expires Decem~ber 31, 2L
Serial No: 15-443 Docket No. 50-423 Page 2 of 2
Attachment:
Marked-Up Technical Specification Bases Page Commitments made in this letter: None cc:
U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd, Suite 100 King of Prussia, PA 19406-2713 R. V. Guzman Senior Project Manager, Mail Stop 08 C2 U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station Director, Radiation Division Department of Energy and Environmental Protection 79 Elm Street Hartford, CT 06106-5127
Serial No.15-443 Docket No. 50-423 ATTACHMENT MARKED-UP TECHNICAL SPECIFICATION BASES PAGE (FOR INFORMATION ONLY)
DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 3
Serial No.15-443 Docket No. 50-423 Attachment, Page 1 of 1 LBDCR No.
-M4Q,
.Fobruary" 2'l, 2005 REACTRCOLNESSE BASES RELIEF VALVES (Continued)
The prime importance for the capability to. close the block valve is to isolate a stuck-open PORV.
Therefore, iI'the block valve(s) cannot be restored to OPERABLE statuswithin 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, the remedial action is to place thae PORV in manual control (i..e.,.the control switch in the "CLOSE" position) to preclude its automatic openiing for an~overpressure event and to avoid the potential of a stuck-open PORV at ~a time that thae block valve is inoperable. The time allowed torestore the block valve(s) to OPERA*BLE status is'basedupon theremedial action time limits for inoperable PORV per ACTION requirements b. and c. ACTION statement d. does not specify closure of the block valves because suchaction would not likely be possible when the block valve is inoperable.
For the same reasons, reference is not made to ACTION statements b. and c. for the required remedial actions.
risk of an unisolable leak"[rom the RCS since the PORV(s)..is already inoperable.
4-1 MILLSTONE - UNIT 3 B3442 B 3/4 &2c Amendment No. 88, 60, 46-4-,
Acknowledged by NRC letter dated 08/2:5/05: