ML18269A351

Closeout of Generic Letter 2016-01, Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools

ML18269A351
Person / Time
Site:	Millstone
Issue date:	09/26/2018
From:	Bruce Watson Reactor Decommissioning Branch
To:	Stoddard D Dominion Nuclear Connecticut
Wall S
References
EPID L-2016-LRC-0001
Download: ML18269A351 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 26, 2018 0MB Control No. 3150-0231 Mr. Daniel G. Stoddard Senior Vice President & Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.

Millstone Power Station Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

MILLSTONE POWER STATION, UNIT 1 - CLOSEOUT OF GENERIC LETTER 2016-01, "MONITORING OF NEUTRON-ABSORBING MATERIALS IN SPENT FUEL POOLS" (EPID L-2016-LRC-0001)

Dear Mr. Stoddard:

On April 7, 2016, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2016-01, "Monitoring of Neutron-Absorbing Materials in Spent Fuel Pools" (Agencywide Documents Access and Management System (ADAMS) Accession No. ML16097A169), to address the degradation of neutron-absorbing materials (NAMs) in wet storage systems for reactor fuel at power and non-power reactors .

. The generic letter requested that licensees provide information to allow the NRC staff to verify continued compliance through effective monitoring to identify and mitigate any degradation or deformation of NAMs credited for criticality control in spent fuel pools (SFPs).

By letter dated November 1, 2016 (ADAMS Accession No. ML16312A064), Dominion Nuclear Connecticut, Inc. (the licensee), responded to GL 2016-01 for Millstone Power Station, Unit 1 (MPS1 ). In the licensee's response to GL 2016-01, the licensee stated that, for MPS1, the licensee credits Carborundum for criticality control and has an established NAM monitoring program. The NRC staff's review determined that the provided response sufficiently addressed the five areas of information described in Appendix A of GL 2016-01 for Carborundum. In particular, the described monitoring program for the Carborundum includes the following key features:

• Neutron attenuation testing of in-situ material.

• Established processes to ensure that the licensee will take the appropriate corrective actions if any potentially non-conforming material is discovered.

• A testing frequency not to exceed 5 years.

D. Stoddard

• Acceptance criteria to ensure maintenance of the 5-percent subcriticality margin for the SFP.

The NRC staff found that the licensee intends to continue monitoring the condition of its NAMs as described in its response.

For MSP1, the NRC staff's review determined that the information provided sufficiently addressed the five areas of information described in Appendix A to GL 2016-01. Based on the review of the information provided, the NRC staff concludes no further information is requested regarding GL 2016-01.

Sincerely, t a

/~ruce A. Watson, CHP, Chief Reactor Decommissioning Branch Division of Decommissioning, Uranium Recovery, and Waste Programs Office of Nuclear Material Safety and Safeguards Docket No. 50-245 cc: ListServ

ML18269A351 *via email OFFICE NRR/DORULSPB/PM* NRR/DORULSPB/LA NRR/DMLR/MCCB/BC*

NAME SWall JBurkhardt SBloom UATE 09/17/18 09/17/18 09/25/18 OFFICE NRR/DI RS/I RGB/BC* NRR/DSS/SNPB/BC* NMSS/DUWP/RDP/BC*

NAME BPham Rlukes BWatson DATE 09/17/18 09/17/18 09/26/18