CP-201600148, Requesting Additional Information for Relief Request b-9 for Unit 2 Second Ten Year Inservice Inspection Interval

Requesting Additional Information for Relief Request b-9 for Unit 2 Second Ten Year Inservice Inspection Interval

ML16076A414
Person / Time
Site:	Comanche Peak
Issue date:	03/02/2016
From:	Hope T Luminant Generation Co, Luminant Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CAC MF6554, CP-201600148, TXX-16030
Download: ML16076A414 (3)

Text

Senior Vice President P O Box 1002

____& Kenneth J. Peters Chief Nuclear Officer (Acting) Luminant Power 6322 North FM 56 Kenneth.Peters@Luminant.com Glen Rose, TX 76043 Lum inant254 89765652 CP-201600148 Ref. # 10CFR50.55a(z)(1)

TXX-16030 March 2, 2016 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK NUCLEAR POWER PLANT DOCKET NO. 50-446 SUPPLEMENT TO RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION FOR RELIEF REQUEST B-9 FOR UNIT 2 SECOND TEN YEAR INSERVICE INSPECTION INTERVAL FROM 10CFR50.55a INSPECTION REQUIREMENTS DUE TO PHYSICAL INTERFRENCES (1998 EDITION OF ASME CODE, SECTION XI, 2000 ADDENDA SECOND INTERVAL START DATE: AUGUST 3, 2004 SECOND INTERVAL END DATE: AUGUST 2, 2014) CAC NO. MF6554 REiFERENCES: 1. Letter logged TXX-15116 dated August 3, 2015 from Rafael Flores to the NRC submitting Relief Request B-9 for Unit 2 Second Ten Year Inservice Inspection Interval from 10CFR50.55a Inspection Requirements due to Physical Interferences

2. Email dated November 13, 2015 from Balwant Singal of the NRC to Timothy Hope of Luminant Power requesting additional information regarding Relief Request B-9 (CAC No. MF6554)

3. Letter logged TXX-15155 dated December 14, 2015 from Rafael Flores to the NRC submitting Response to Request for Addition Information for Relief Request B-9 for Unit 2 Second Ten Year Inservice Inspection Interval from 10CFR50.55a Inspection Requirements due to Physical Interferences

Dear Sir or Madam:

Per Reference 1, Luminant Generation Company, LLC (Luminant Power) submitted Relief Request B-9 for Comanche Peak Unit 2 for the second ten year inservice inspection interval. Per Reference 2, the NRC provided a request for additional information regarding the subject relief request. Per Reference 3, Luminant Power submitted a response to the request for additional information regarding the subject relief request.

Based on discussion with the NRC Project Manager on February 1, 2016, the Luminant Power response to Request 2 in Reference 3 is being supplemented to address the material specifications for the weld and associated components.

Attached is the Luminant Power supplement to the response to the request for additional information.

This communication contains no new licensing basis commitments regarding Comanche Peak Unit 2.

U. S. Nuclear Regulatory Commission TXX-16030 Page 2 of 2 031/02/2016 Should you have any questions, please contact Mr. Jack Hicks at (254) 897-6725.

Sincerely, Luminant Generation Company LLC Kenneth J. Peters By:

TimothyA.Ho*e &

Manager, Regulatory Affairs Attachment - Supplement to Response to Request for Information Regarding Unit 2 Relief Request B-9 Second Ten Year Interval Inspection Requirements due to Physical Interferences c - Marc L. Dapas, Region IV Balwant K. Singal, NRR Resident Inspectors, Comanche Peak Robert Free, TDLR Jack Ballard, ANTI, Comanche Peak

Attachment to TXX-i16030 Page 1 of i COMANCHE PEAK NUCLEAR POWER PLANT UNIT 2 SUPPLEMENT TO RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST B-9 FOR SECOND TEN YEAR INTERVAL INSPECTION REQUIREMENTS DUE TO PHYSICAL INTERFERENCES (SECOND 10-YEAR ISI INTERVAL END DATE: August 2, 2014)

CAC NO. MF6553 NRC REQUEST 2:

Please provide the following information:

a. Material specifications (e.g., austenitic stainless steel pipes SA-376, TP-304 and austenitic stainless steel ER-308 weidment) for the weld and associated components (e.g., safe ends, pipes, and elbows).

b. Thickness of the pipe.

LUMINANT POWER RESPONSE TO REQUEST 2:

a. TCX-1-4300-2 and TCX-1-4400-2: Cast stainless steel SA-351 Type CF8A pipe with ER-308 weldment material and SA-182 F316 safe end.

TCX-1-4100-13, TCX-1-4200-13 and TCX-1-4400-13: Cast stainless steel SA-351 Type CF8A elbow with ER-308 weldment material and SA-182 F316 safe end.

b. The minimum wall thickness of the pipe segments associated with welds TCX-1-4300-2 and TCX 4400-2 is 2.33". The minimum wall thickness of the pipe segments associated with welds TCX 4100-13, TCX-1-4200-13 and TCX-1-4400-13 is 2.21".