CP-201301278, Relief Request No. 1/2E3-1 for Containment Electrical Penetrations (Third IWE Interval: Start Date - September 10, 2012; End Date - September 9, 2021)

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Relief Request No. 1/2E3-1 for Containment Electrical Penetrations (Third IWE Interval: Start Date - September 10, 2012; End Date - September 9, 2021)
ML13312A124
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 10/31/2013
From: Flores R, Thomas McCool
Luminant Power
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
CP-201301278, TXX-13157
Download: ML13312A124 (12)
v • d • e


Text

Rafael Flores Luminant Power Senior Vice President P 0 Box 1002

& Chief Nuclear Officer 6322 North FM 56 Rafael.Flores@Luminant.com Glen Rose, TX 76043 Luminant T C 817 559 0403 F 254 897 6652 CP-201301278 Ref. # 10CFR50.55a(a)(3)(ii)

TXX-13157 October 31, 2013 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK NUCLEAR POWER PLANT DOCKET NOS. 50-445 AND 50-446 RELIEF REQUEST NO. 1/2E3-1 FOR CONTAINMENT ELECTRICAL PENETRATIONS (THIRD IWE INTERVAL: START DATE-SEPTEMBER 10, 2012; END DATE-SEPTEMBER 9,2021)

REFERENCES:

1. Letter logged TXX-12118 dated August 16, 2012, from Rafael Flores to the NRC submitting Relief Request E-1 for Containment Electrical Penetrations (TAC Nos.

ME9261 and ME 9262) (ML12240A051)

2. Letter logged TXX-12162 dated November 14, 2012, from Rafael Flores to the NRC submitting Response to Request for Additional Information for Relief Request E-1 (TAC Nos. ME9261 and ME 9262) (ML12348A006)
3. NRC Letter dated June 26, 2013 from Michael T. Markley to Rafael Flores concerning Request for Relief No. E-1 (TAC Nos. ME9261 and ME 9262) (ML13158A093)

Dear Sir or Madam:

Pursuant to 10 CFR 50.55a(a)(3)(ii), Luminant Generation Company LLC (Luminant Power) is submitting Relief Request 1/2 E3-1 for containment electrical penetrations for the third ten year IWE Inspection interval for Comanche Peak Nuclear Power Plant (CPNPP) Units 1 and 2.

Luminant Power has determined that compliance with certain inspection requirements of ASME Section XI would result in an unnecessary hardship or unusual difficulty without a compensating increase in the level of quality and safety.

This relief request was previously submitted to the NRC via References I and 2 and reviewed via Reference 3.

Luminant Power requests approval of this relief request by March 29, 2014, to support the upcoming CPNPP Unit 2 refueling outage.

This communication contains no new commitments regarding Comanche Peak Units 1 and 2.

A member of the STARS Alliance Callaway- Comanche Peak

  • Diablo Canyon
  • Palo Verde
  • Wolf Creek

U. S. Nuclear Regulatory Commission TXX-13157 Page 2 of 2 10/31/2013 Should you have any questions, please contact Mr. Jack Hicks at (254) 897-6725.

Sincerely, Luminant Generation Company LLC Rafael Flores By:

Thomas P. McCool Vice President, Station Support Attachments 1. Relief Request 1/2E3-1For Containment Electrical Penetrations (Third IWE Interval: Start Date - September 10, 2012)

2. Local Leak Rate (Type B) Results c- Marc L. Dapas, Region IV Balwant K. Singal, NRR Resident Inspectors, Comanche Peak Jack Ballard, ANII, Comanche Peak Robert Free Environmental Monitoring & Emergency Response Manager Texas Department of State Health Services Mail Code 1986 P.O. Box 149347 Austin, TX 78714-9347 to TXX-13157 Page 1 of 3 COMANCHE PEAK NUCLEAR POWER PLANTS UNITS 1 AND 2 RELIEF REQUEST NUMBER 1/2E3-1 FOR CONTAINMENT ELECTRICAL PENETRATIONS (THIRD 10 YEAR IWE INTERVAL START DATE: SEPTEMBER 10, 2012)
1. ASME Code Component Affected:

CPNPP Unit 1 and Unit 2 IWE Containment Electrical Penetrations that are covered by Radiant Energy Shielding (RES) as listed below:

CPNPP Unit 1 Electrical Penetrations:

E-0006, E-0009, E-0016, E-0018, E-0029, E-0039, E-0040, E-0056, E-0060 CPNPP Unit 2 Electrical Penetration:

2-E-0006, 2-E-0009, 2-E-0015, 2-E-0016, 2-E-0018, 2-E-0039, 2-E-0040, 2-E-0045, 2-E-0056, 2-E-0060, 2-E-0066, 2-E-0061

2. Applicable Code Edition and Addenda:

The applicable ASME Boiler and Pressure Vessel Code (hereafter referred to as the "Code")

edition and addenda is ASME Section XI, "Rules for Inservice of Nuclear Power Plant Components," 2007 Edition through 2008 Addenda.

3. Applicable Code Requirement:

Table IWE-2500-1, Examination Category E-A, Item No. E1.11, of the Code requires a General Visual inspection of 100% of the accessible containment surface areas including the electrical penetrations listed in Section 1 of this Relief Request.

4. Impracticality of Compliance (10CFR50.55a(a)(3)(ii))

The surfaces of 20 of 21 electrical penetrations are currently covered with Radiant Energy Shielding (RES) material which precludes the General Visual examination of the surface required by Table IWE-2500-1, Examination Category E-A, Item No. E1.11. This RES material is designed for post fire safe shutdown protection. RES is made from a custom sewn ceramic fiber blanket in a fireproof fabric envelope which is banded in place and is not designed for removal and reinstallation. The construction of the RES is such that, if damaged, the fibrous material can create excessive waste, and will require additional attention to prevent sump clogging. Electrical Penetration 2-E-0061 will have RES material installed during the 2RF14 refueling outage.

Relief Request 1/2E3-1 pertains to the visual examination of 21 stainless steel electrical penetration assemblies covered with radiant energy shielding material that are proposed to not be visually examined each period (3) during the third IWE interval. The local areas of the containment liner around these 21 electrical penetrations will be visually examined each period during the third interval. Electrical Penetration 2-E-0061 is included for future inspection periods during the third IWE interval. A visual examination will be performed prior to installation of the RES material on 2-E-0061.

5. Burden Caused by Compliance:

A total of 1200 man-hours per Unit would be required to remove the RES, perform the examination, repair and/or replace damaged RES, and re-install install the shielding. The total radiation exposure to perform these activities is estimated to exceed 3.5 man-Rem per unit over the inspection interval. The extensive craft and radiation protection support that would be to TXX-13157 Page 2 of 3 COMANCHE PEAK NUCLEAR POWER PLANTS UNITS 1 AND 2 RELIEF REQUEST NUMBER 1/2E3-1 FOR CONTAINMENT ELECTRICAL PENETRATIONS (THIRD 10 YEAR IWE INTERVAL START DATE: SEPTEMBER 10, 2012) required for scaffolding, RES material removal, repair or replacement of damaged RES material, and RES material re-installation on these 21 electrical penetrations would not be compensated for by an increase in the level of plant quality and safety.

6. Proposed Alternative and Basis for Use:

The accessible surface areas of the metal containment liner, including all mechanical penetrations and the remaining 66 Unit I and 34 Unit 2 electrical penetrations are not covered with RES and are accessible for the required examination. An evaluation of these covered penetrations would be performed and the RES would be removed if conditions exist in accessible areas that indicate degradation could also exist or extend into the RES covered areas. This relief is being requested for 21 electrical penetrations (9 for Unit 1, 12 for Unit 2) which are all of stainless steel construction and represent less than I percent of the total IWE metal containment surface area.

The previously examined mechanical penetration assemblies and the containment liner are of carbon steel construction and are more susceptible to corrosion type damage mechanisms. The carbon steel containment liner and mechanical penetrations and the remaining stainless steel electrical penetrations have all been examined each period during the second interval without any degradation or corrosion identified. Also, Comanche Peak has adequate confidence that the stainless steel surfaces of the electrical penetrations are not susceptible to the damage mechanisms that may affect the carbon steel surfaces. Therefore, there are no additional safety benefits in examining these penetration surfaces.

Additionally, below are the results of Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Appendix J containment integrated leak rate test (Type A) and their comparison with the allowable leakage rate specified in the plant Technical Specifications (TSs).

Reference T.S. 5.5.16.c & 5.5.16.d.1 & T.S. Bases 3.6.1:

Allowable leakage rate (La) of 0.1% of containment air weight per day.

The As-found Type A test surveillance acceptance criteria is leakage rate less than or equal to 1.0 La. In addition the As-left Type A test surveillance acceptance criteria is leakage rate less than or equal to 0.75 La prior to entering the mode in which containment operability is required (Mode 4).

Unit 1 Type A test results performed in April 2007:

  • The As-found leakage rate was 0.063019% weight per day which met the As-found surveillance criteria of 0.1% weight per day.
  • The As-left leakage rate was 0.0630% weight per day which met the As-left surveillance criteria of 0.075% weight per day.

Unit 2 Type A test results performed in October 2012:

  • The As-found leakage rate was 0.0595% weight per day which met the As-found surveillance criteria of 0.1% weight per day.
  • The As-left leakage rate was 0.0594% weight per day which met the As-left surveillance criteria of 0.075% weight per day.

The results of Type B leakage test of those electrical penetrations included in RR 1/2E3-1 (total of 21 penetrations, 9 in CPNPP, Unit 1 and 12 in CPNPP, Unit 2) are provided in Attachment 2.

Attachment I to TXX-13157 Page 3 of 3 COMANCHE PEAK NUCLEAR POWER PLANTS UNITS 1 AND 2 RELIEF REQUEST NUMBER 1/2E3-1 FOR CONTAINMENT ELECTRICAL PENETRATIONS (THIRD 10 YEAR IWE INTERVAL START DATE: SEPTEMBER 10, 2012)

The electrical penetrations are tested in groupings by elevation. The electrical penetrations in question are part of the overall groupings categorized as follows:

Unit 1:

  • 852-ELEC-PEN includes E-0006, E-0009, E-0016, & E-0018
  • 832-ELEC-PEN includes E-0029, E-0039, & E-0040
  • 810-ELEC-PEN includes E-0056 & E-0060 Unit 2:
  • 2-852-ELEC-PEN includes 2-E-0006, 2-E-0009, 2-E-0015, 2-E-0016, & 2-E-0018
  • 2-832-ELEC-PEN includes 2-E-0039, 2-E-0040, & 2-E-0045
  • 2-810-ELEC-PEN includes 2-E-0056, 2-E-0060, 2-E-0061, & 2-E-0066 See Attachment 2 for the Local Leak Rate (Type B) Results for each grouping. There have been no previous failures for these penetrations for Unit 1 or Unit 2. The results listed in Attachment 2 are in standard cubic centimeters per minute (sccm). The administrative limit for each test is 100 sccm. However, the Unit I tests performed in 1991 had an administrative limit of 25 sccm. The two tests that exceeded 25 sccm had a technical evaluation performed which documented the acceptability of the test results via Technical Evaluation (TE) 91-2683.

The discussion above and the results of the Type A and Type B tests demonstrate that there are no additional safety benefits in examining these penetration surfaces.

7. Duration of Proposed Alternative:

The third ten-year IWE interval for CPNPP Unit 1 and Unit 2 began on September 10, 2012 and will end on September 9, 2021. The third interval was shortened to nine years due to extending the second interval to eleven years.

8. Precedents:
1) Letter logged TXX-01148 dated September 10, 2001 from C. L. Terry to the NRC submitting Relief Request E-2 for Unit 1 Electrical Penetrations (ADAMS Accession Number ML012570293)
2) Letter logged TXX-00151 dated August 10, 2000 from C. L. Terry to the NRC submitting Relief Requests D-1 and E-2 for Unit 2 Electrical Penetrations (ADAMS Accession Number ML003741700)
3) Letter logged TXX-12118 dated August 16,2012 from Rafael Flores to the NRC submitted Relief Request E-1 for Unit 1 and Unit 2 Electrical Penetrations for the Second IWE Interval (ADAMS Accession Number ML12240A051) and supplemented on November 14, 2012 (ADAMS Accession Number ML12348A006)

ATTACHMENT 2 to TXX-13157 Local Leak Rate (Type B) Results

NMMLR07 TU ELECTRIC Page: 1 of I CPSES IAttachment 2 to TXX-13157 LOCAL LEAK RATE TEST Date 11/0612012 2of 7 1 Past Performance History Report Time : 13:32:19 UnitlPene.No  : 852-ELEC-PEN SystemlService : ELEC. PEN ASSY Procedure  : OPT-860A/ RT 504952 Current Interval : 3660 Maximum Path Test Type C Minimum Path AsFound (AF)  : 91.30 91.30 Pene. Status . Passed AsLeft (AL) 91.30 91.30 Next Test Due  : 10/29/2015 Valve/Boundary  : 852-ELEC-TC Inside IOustide

  • Outside Concurrently Tested Valve(s)/Boundary(s) Admin. Limit  : 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 10/21/2005 91.30 5-05-504952-AA Passed AS LEFT 10/21/2005 91.30 5-05-504952-AA Yes Passed AS FOUND 10/01/2002 2.00 5-02-504952-AA Passed AS LEFT 10/01/2002 2.00 5-02-504952-AA Yes Passed AS FOUND 03/04/1995 17.00 5-94-501651-AA Passed AS LEFT 03/04/1995 17.00 5-94-501651-AA Yes Passed AS FOUND 04/14/1993 20.00 5-92-501651-AA Passed AS LEFT 04/14/1993 20.00 5-92-501651-AA Yes Passed AS FOUND 09/12/1991 68.00 S-91-00008 -25 Passed AF Comments: SEE TE 91-2683 AS LEFT 09/12/1991 68.00 S-91-00008 -25 Yes Passed

      • END OF HISTORY REPORT FOR : 852-ELEC-PEN

NMMLR07 TU ELECTRIC Page: 1 of CPSES Attachment 2 to TXX-1 3157 LOCAL LEAK RATE TEST Past Performance History Report Date 11/06/2012 Page 3 of 7 Time : 13:34:16 Unit/Pene.No  : 832-ELEC-PEN System/Service : ELEC. PEN Procedure  : OPT-859A / RT 504951 CurrentInterval : 3660 Minimum Path Maximum Path Test Type AsFound (AF)  : 20.00 20.00 Pene. Status . Passed AsLt (AL) : 20.00 20.00 Next Test Due  : 10/29/2015 Valve/Boundary : 832-ELEC-TC Inside/Oustide

  • Outside Concurrently Tested Valve(s)/Boundary(s) Admin. Limit 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 10/21/2005 20.00 5-05-504951-AA Passed AS LEFT 10/21/2005 20.00 5-05-504951-AA Yes Passed AS FOUND 02/22/2005 58.50 5-99-504951-AA Passed AS LEFT 02/22/2005 58.50 5-99-504951-AA Yes Passed AS FOUND 03/04/1995 20.00 5-94-501376-AA Passed AS LEFT 03/04/1995 20.00 5-94-501376-AA Yes Passed AS FOUND 04/15/1993 20.00 5-92-501376-AA Passed AS LEFT 04/15/1993 20.00 5-92-501376-AA Yes Passed AS FOUND 09/13/1991 3.50 S-91-00008 -24 Passed AS LEFT 09/13/1991 3.50 S-91-00008 -24 Yes Passed

      • END OF HISTORY REPORT FOR : 832-ELEC-PEN

NMMLR07 Attachment 2 to TXX-13 TU ELECTRIC Page: 1 of I Page LOCAL LEAK RATE TEST Date 11/0612012 1 Past Performance History Report Time: 13:35:32 Unit/Pene. No 810-ELEC-PEN System/Service: ELEC. PENS.

Procedure OPT-858A / RT 504950 CurrentInterval : 3660 Maximum Path Test Type C Minimum Path AsFound (A) . 1.00 .. 31.00 Pene. Status . Passed AsLeft (AL)  : 31.00 31.00 Next Test Due 10/29/2015 Valve/Boundary  : 810-ELEC-TC Inside/Oustide Outside Concurrently Tested Valve(s)lBoundary(s) Admin. Limit 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 10/21/2005 31.00 5-05-504950-AA Passed AS LEFT 10/21/2005 31.00 5-05-504950-AA Yes Passed AS FOUND 03/01/2005 4.00 5-99-504950-AA Passed AS LEFT 03/01/2005 4.00 5-99-504950-AA Yes Passed AS FOUND 03/04/1995 20.00 5-94-500217-AA Passed AS LEFT 03/04/1995 20.00 5-94-500217-AA Yes Passed AS FOUND 04/15/1993 20.00 5-92-500217-AA Passed AS LEFT 04/15/1993 20.00 5-92-500217-AA Yes Passed AS FOUND 09/12/1991 49.00 S-91-000082-3 Passed AF Comments:SEE TE 91-2683 AS LEFT 09/12/1991 49.00 S-91-000082-3 Yes Passed

      • END OF HISTORY REPORT FOR : 810- ELEC- PEN

NMMLR07 Attachment 2 to TXX-131571 TU ELECTRIC Page: 1 of I CPSES Page LOCAL LEAK RATE TEST Date 11/06/2012 Page 5 of 7 Past Performance History Report Time : 13"20:53 Unit/Pene.No  : 2-852-ELEC-PEN System/Service : ELEC PEN Procedure

  • OPT-860B / RT 504708 CurrentInterval : 1830 Maximum Path Test Type C Minimum Path As Foun (AF): 71.00 71.00 Pene. Status . Passed AsLeft (,.)  : 71.00 71.00 Next Test Due  : 09/25/2017 Valve/Boundary  : 2-852-ELEC-TC Inside IOustide
  • Outside Concurrently Tested Valve(s)/Boundary(s) Admin. Limit 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 09/21/2012 71.00 -- 444939-1 Passed AS LEFT 09/21/2012 71.00 -- 444939-1 Yes Passed AS FOUND 07/30/2009 20.00 -- 350413-7 Passed AS LEFT 07/30/2009 20.00 -- 350413-7 Yes Passed AS FOUND 04/21/2005 78.00 5-05-504708-AA Passed AS LEFT 04/21/2005 78.00 5-05-504708-AA Yes Passed AS FOUND 04/02/2002 20.00 5-02-504708-AA Passed AS LEFT 04/02/2002 20.00 5-02-504708-AA Yes Passed AS FOUND 01/02/2001 20.30 5-99-504708-AA Passed AS LEFT 01/02/2001 20.30 5-99-504708-AA Yes Passed AS FOUND 02/25/1996 11.76 5-95-501368-AA Passed AS LEFT 02/25/1996 11.76 5-95-501368-AA Yes Passed AS FOUND 10/09/1994 7.80 5-94-501368-AA Passed AS LEFT 10/09/1994 7.80 5-94-501368-AA Yes Passed

      • END OF HISTORY REPORT FOR : 2-852-ELEC-PEN

NMMLR07 571 TU ELECTRIC Page: 1 of CPSES CPI Attachment 6o 2 to TXX- 13157 CSage 6 of 7 IPg LCLLA LOCAL AETS LEAK RATE TEST Past Performance History Report Date :

te 11/06/2012 13206 Time : 13-.25:06 Unit/Pene. No  : 2-832-ELEC-PEN SystemlService : ELEC PEN Procedure  : OPT-859B Current Interval : 1830 Minimum Path Maximum Path Test Type AsF d (AF)  : 53.00 53.00 Pene. Status . Passed As Left.. (AL) : 53.00 53.00 Next Test Due  : 09/25/2017 Valve/Boundary : 2-832-ELEC-TC InsidelOustide

  • Outside Concurrently Tested Valve(s)/Boundary(s) Admin. Limit  : 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 09/21/2012 53.00 -- 442849-1 Passed AS LEFT 09/21/2012 53.00 -- 442849-1 Yes Passed AS FOUND 06/27/2009 96.00 -- 350324-2 Passed AS LEFT 06/27/2009 96.00 -- 350324-2 Yes Passed AS FOUND 04/20/2005 84.00 5-03-504698-AA Passed AS LEFT 04/20/2005 84.00 5-03-504698-AA Yes Passed AS FOUND 12/01/2000 50.00 5-99-504698-AA Passed AS LEFT 12/01/2000 50.00 5-99-504698-AA Yes Passed AS FOUND 02/24/1996 19.40 5-95-502014-AA Passed AS LEFT 02/24/1996 19.40 5-95-502014-AA Yes Passed AS FOUND 10/08/1994 14.00 5-94-502014-AA Passed AS LEFT 10/08/1994 14.00 5-94-502014-AA Yes Passed

      • END OF HISTORY REPORT FOR : 2-832-ELEC-PEN

NMMLR07 Attachment 2 to TXX-131571 TU ELECTRIC Page: 1 of Page 7 of 7 LOCAL LEAK RATE TEST Date 11106/2012 Past Performance History Report Time: 13:27:01 Unit/Pene.No  : 2-810-ELEC-PEN System/Service: ELEC PEN Procedure  : OPT-858B/ RT 504697 CurrentInterval : 1830 Minimum Path Maximum Path Test Type As Fund(AF)  : 55.50 55.50 Pene. Status . Passed AsLeft (AL)  : 55.50 55.50 Next Test Due  : 09/30/2017 Valve/Boundary  : 2-810-ELEC-TC InsidelOustide

  • Outside Concurrently Tested Valve(s)/Boundary(s) Admin. Limit 100 No Related Tag(s)

Test Leak Work Order As Left Test Date Rate Number Entered? Status AS FOUND 09/26/2012 55.50 -- 443028-4 Passed AS LEFT 09/26/2012 55.50 -- 443028-4 Yes Passed AS FOUND 06/30/2009 74.50 -- 350321-4 Passed AS LEFT 06/30/2009 74.50 -- 350321-4 Yes Passed AS FOUND 04/20/2005 77.40 5-03-504697-AA Passed AS LEFT 04/20/2005 77.40 5-03-504697-AA Yes Passed AS FOUND 12/16/2000 85.00 5-99-504697-AA Passed AS LEFT 12/16/2000 85.00 5-99-504697-AA Yes Passed AS FOUND 02/25/1996 15.62 5-95-500059-AA Passed AS LEFT 02/25/1996 15.62 5-95-500059-AA Yes Passed AS FOUND 10/09/1994 23.40 5-94-500059-AA Passed AS LEFT 10/09/1994 23.40 5-94-500059-AA Yes Passed

      • END OF HISTORY REPORT FOR : 2-810-ELEC-PEN
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