ML13309A729

Request for Additional Information

ML13309A729
Person / Time
Site:	Vogtle
Issue date:	11/07/2013
From:	Martin R Plant Licensing Branch II
To:	Pierce C Southern Nuclear Operating Co
Martin, Robert NRR/DORL 415-1493
References
TAC ME9666, TAC ME9667
Download: ML13309A729 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 7, 2013 Mr. C. R. Pierce Regulatory Affairs Director Southern Nuclear Operating Company, Inc.

Post Office Box 1295, Bin - 038 Birmingham, AL 35201-1295

SUBJECT:

VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME9666 and ME9667)

Dear Mr. Pierce:

By letters dated September 26, 2012, and August 7, 2013, Southern Nuclear Operating Company submitted a license amendment request (LAR) to revise the Completion Time for Technical Specification 3.7.14, "Engineered Safety Features (ESF) Room Cooler and Safety Related Chiller System."

The Nuclear Regulatory Commission staff finds that additional information is needed as set forth in the Enclosure. Please provide the additional information within thirty (30) days of the date of this letter.

Sincerely,

(] ,Pb ,7Ll~

~. ~;rtin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-424 and 50-425 cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION (RAil REQUEST TO REVISE TECHNICAL SPECIFICATION 3.7.14 ~ ENGINEERED SAFETY FEATURES (ESF) ROOM COOLER AND ESSENTIAL CHILLED WATER (ECW) SYSTEM VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 (VEGP)

Background

The table in Enclosure 6 (page E6~1) of the licensee's submittal dated September 26,2012, provides a listing of areas served and room numbers for the Unit 1 Train 1A ESF room chiller.

The safety functions of the safety~related loads in the rooms listed on page E6~ 1 provide the required redundancy of the safety functions provided by the similar Unit 1 Train 1B ECW loads.

When the inoperability of the 1A ECW chiller train is extended to 7 days, the safety~related loads in the rooms listed on page E6~ 1 are inoperable for 7 days and the required redundancy of the associated safety functions are lost.

Some safety~related functions have Technical Speci'fications (TSs) and corresponding Completion Times (CTs) that are greater than or equal to 7 days. The temporary loss of redundancy is already satisfactorily taken into account by the TS. However, some loads have CTs less than 7 days {e.g. residual heat removal, containment spray, component cooling water pump rooms} and some loads may not have associated TSs.

The staff needs to know the extent of safety~related systems and functions that are affected or become inoperable as a result of loss of an ESF chiller, including those that do not have TS.

RAI~ 1 For each room number listed on page E6~ 1, please provide a listing by room number of all safety~related systems and functions [that are listed or described in TS and/or the Updated Final Safety Analysis Report] that have any safety~related component(s) in the room. Also, for each identified safety-related system and/or function, identify all associated TS. The requested format is:

2 ESF Room Cooler Room Number Safety Related System Technical Specification and/or Function Affected (if applicable) 1-1531-N7-001-000 Main Control Room 1-1532-A7-001-000 884 ------

etc.

876 --_ .... _

etc.

879 860 856 etc.

1-1539-A7 -001-000 A45 etc. etc. etc. etc.

RAI-2 Provide technical justification for extending the inoperability of the safety-related systems and/or functions identified in (a) above to 7 days. The technical justification may include, but not limited to, such factors as appropriate compensatory action and the availability of normal chilled water.

[Note: The licensee's statement in the September 26, 2012 submittal that "the Conditions and Required Actions of the supported systems are not required to be entered as allowed by LCO 3.0.6" is not sufficient technical justification because the exception of TS 3.0.6 is justified when the actions that are required to ensure the unit is maintained in a safe condition are specified in the support system (ECW) LCO's Required Actions. This may not be the case when the support system CT is increased to 7 days.]

The staff recognizes that the licensee's response to this request for information will also apply to Unit 1 Train 8 and Unit 2 Trains A and 8 and will use it accordingly for the staff's safety evaluation.

November 7,2013 Mr. C. R. Pierce Regulatory Affairs Director Southern Nuclear Operating Company, Inc.

Post Office Box 1295, Bin 038 Birmingham, AL 35201-1295

SUBJECT:

VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME9666 and ME9667)

Dear Mr. Pierce:

By letters dated September 26, 2012, and August 7, 2013, Southern Nuclear Operating Company submitted a license amendment request (LAR) to revise the Completion Time for Technical Specification 3.7.14, "Engineered Safety Features (ESF) Room Cooler and Safety Related Chiller System."

The Nuclear Regulatory Commission staff finds that additional information is needed as set forth in the Enclosure. Please provide the additional information within thirty (30) days of the date of this letter.

Sincerely, IRA!

Robert E. Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-424 and 50-425 cc w/encl: Distribution via Listserv DISTRIBUTION:

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