05000458/LER-1917-005, Regarding Operations Prohibited by Technical Specifications Due to Inoperable Main Control Room Filter Train

Regarding Operations Prohibited by Technical Specifications Due to Inoperable Main Control Room Filter Train

ML17156A615
Person / Time
Site:	River Bend
Issue date:	06/05/2017
From:	Vercelli S Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RBF1-17-0062, RBG-47762 LER 17-005-00
Download: ML17156A615 (5)

LER-1917-005, Regarding Operations Prohibited by Technical Specifications Due to Inoperable Main Control Room Filter Train

Event date:
Report date:
4581917005R00 - NRC Website

text

Entergx RBG-47762 June 5, 2017 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

RBF1-17-0062 Licensee Event Report 50-458 /2017-005-00 River Bend Station - Unit 1 Docket No. 50-458 License No. NPF-47

Dear Sir or Madam:

In accordance with 10 CFR 50.73, enclosed is the subject Licensee Event Report. This document contains no commitments. If you have any questions, please contact Mr. Tim Schenk at 225-381-4177.

sinc~d\\

SPV / dhw Enclosure cc:

U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Blvd.

Arlington, TX 76011-4511 NRC Sr. Resident Inspector P. O. Box 1050 St. Francisville, LA 70775 INPO (via ICES reporting)

Licensee Event Report 50-458 / 2017-005-00 June 5, 2017 RBG-47762 Page 2 of 2 Central Records Clerk Public Utility Commission of Texas 1701 N. Congress Ave.

Austin, TX 78711-3326 Department of Environmental Quality Office of Environmental Compliance Radiological Emergency Planning and Response Section Ji Young Wiley P.O. Box 4312 Baton Rouge, LA 70821-4312

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150*0104 EXPIRES: 03/31/2020 (04*2017)

, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

3. LER NUMBER YEAR River Bend Station - Unit 1 05000-458 2017 CORRECTIVE ACTION TO PREVENT RECURRENCE SEQUENTIAL NUMBER 005 REV NO.

00 Irhe applicable surveillance test procedures will be revised to include instructions on proper torqueing of the locking bolts of the manually-operated dampers. This action is being tracked in the corrective action program.

PREVIOUS OCCURRENCE EVALUATION No similar events have been reported by River Bend Station in the last three years.

SAFETY SIGNIFICANCE

During the 8-minute period when both divisions of the main control room fresh air system were inoperable on March 15, the Division 2 subsystem was under the direct control of a dedicated operator as part of planned testing. That subsystem was thus available for service had it been necessary. At all other times, the Division 2 subsystem was operable and able to fulfill its design safety function. This event, therefore, did not constitute an actual loss of safety function. This event was of minimal significance to the health and safety of the public.

(NOTE: Energy Industry Identification System component function identifier and system name of each component or system referred to in the LER are annotated as (**XX**) and [XX], respectively.) Page 3 of 3