RNP-RA/14-0010, Response to NRC Request for Additional Information Regarding License Amendment Request to Modify Technical Specification 3.8.1 Proposed Changes to Diesel Generator Testing Requirements

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Response to NRC Request for Additional Information Regarding License Amendment Request to Modify Technical Specification 3.8.1 Proposed Changes to Diesel Generator Testing Requirements
ML14037A105
Person / Time
Site: Robinson Duke Energy icon.png
Issue date: 01/30/2014
From: William Gideon
Duke Energy Carolinas, Duke Energy Corp
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
RNP-RA/14-0010, TAC NO. MF2737
Download: ML14037A105 (9)
v • d • e


Text

W R. GIDEON DUKE ENERGYe H. B. Robinson Steam Electric PlantUnit 2 Site Vice President Duke Energy 3581 West Entrance Road Hartsville, SC 29550 10 CFR 50.36 Serial: RNP-RA/14-0010.

JAN 302D14 ATTN: Document Control Desk United States Nuclear Regulatory Commission Washington, DC 20555-0001 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261/RENEWED LICENSE NO. DPR-23 RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO MODIFY TECHNICAL SPECIFICATION 3.

8.1 PROPOSED CHANGE

S TO DIESEL GENERATOR TESTING REQUIREMENTS (TAC NO. MF2737)

References:

1. Letter from Sharon A. Wheeler-Peavyhouse (Duke Energy Progress, Inc.) to the, U.S.

Nuclear Regulatory Commission (Serial: RA-1 3-0051), License Amendment Request to Modify Technical Specification 3.8.1 Proposed Changes to Diesel GeneratorTesting Requirements, dated September 10, 2013, ADAMS Accession NUmber ML13261A289

2. E-mail from Siva Lingam (USNRC) to Richard Hightower (Duke Energy Progress, Inc.),

H.B. Robinson, Unit 2 - RAIs for LAR Associated with Modification to TS 3.8.1 Regarding Diesel GeneratorTesting Requirements (TAC No. MF2717), dated January 8, 2014, ADAMS Accession Number ML14016A278 Ladies and Gentlemen:

By letter dated September 10, 2013 (Reference 1), Duke Energy Progress, Inc., formerly known as Carolina Power & Light Company, submitted a license amendment request to modify Technical Specification 3.8.1 .B.3.2.2.

On January 8, 2014, the NRC provided a request for additional information (RAI) (Reference 2),

concerning the referenced license amendment request. Duke .Energy Progress's response to the NRC's RAI is enclosed. . .

There are no regulatory commitments made in this submittal. If you have aný questions':'.:

regarding this submittal, please contact Mr. R. Hightower at (843) 857-1329.

ýtDl

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United States Nuclear Regulatory Commission Serial: RNP-RA/14-0010 Page 2 of 2 I declare under penalty of perjury that the foregoing is true and correct.

Executed On:

Sincerely, W. R. Gideon Site Vice President WRG/jmw Enclosure cc: Mr. V. M. McCree, NRC, Region II Mr. Siva P. Lingam, NRC Project Manager, NRR NRC Resident Inspector, HBRSEP, Unit No. 2

U. S. Nuclear Regulatory Commission Enclosure to Serial RNP-RN14-0010 7 Pages (including cover sheet)

RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO MODIFY TECHNICAL SPECIFICATION 3.

8.1 PROPOSED CHANGE

S TO DIESEL GENERATOR TESTING REQUIREMENTS (TAC NO. MF2737) .

U. S. Nuclear Regulatory Commission Enclosure to Serial RNP-RAI14-0010 Page 2 of 7 Response to Request for Additional Information RAI:

Provide the appropriate TS Required Action(s), Note(s) or Completion Time(s) in accordance with this regulation [10 CFR 50.36(a)(1)] to avoid the TS Bases from becoming part of the TS, within 30 days of this e-mail.

Response to RAI:

The markup and retyped Technical Specifications (TS) pages as well as the markup TS Bases pages have been revised as requested to prevent the TS Bases from becoming part of the TS. The revised pages are provided by means of this Enclosure and supersedes those pages conveyed via the original submittal. Please replace the pages of the original submittal as indicated below.

L I Original Page(s) Revised Page(s)

TS Markup: 3.8-2 TS Markup: 3.8-2 & 3.8-3 TS Retyped: 3.8-2 TS Retyped: 3.8-2 & 3.8-3 TS Bases MarkuD: B 3.8-9 TS Bases MarkuD: B 3.8-9

AC Sources-Operating 3.8.1 ACTIONS (continued)

CONDITION I REQUIRED ACTION I COMPLETION TIME B. One DG inoperable. B. 1 Perform SR 3.8.1.1 for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the offsite circuit.

AND Once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter AND B.2 Declare required 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> from feature(s) supported by discovery of the inoperable DG Condition B

NOTE---------- inoperable when its concurrent with Not required to be performed required redundant inoperability of when the cause of the inoperable feature(s) is inoperable. redundant required feature(s)

DG is pre-planned, preventive AND maintenance and testing. At any point during the pre-planned B.3.1 Perform SR 3.8.1.2 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> maintenance or testing, if any OPERABLE DG new failure requiring corrective OR maintenance is detected, Required Action B.3.2.2 must be B.3.2.1 Determine OPERABLE 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> entered for the OPERABLE DG. DG is not inoperable due Ifthe 96-hour Completion Time to common cause failure.

has expired at the point of AND discovery of the failure requiring corrective maintenance, then at B.3.2.2 Perfo rm SR 3.8.1.2 for 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> the time of discovery Required OPEFRABLE DG.

Action B.3.1 must be entered for the OPERABLE DG. AND (continued)

HBRSEP Unit No. 2 3.8-2 Amendment No.

AC Sources-Operating 3.8.1 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. (continued) B.4 Restore DG to 7 days OPERABLE status.

AND 8 days from discovery of failure to meet LCO C. Required.Action and C.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition A or B AND not met.

C.2 Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> D. Two or more AC sources ------ NOTE ----------

inoperable. Entry into this Required Action may be delayed for no greater than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> during performance of Required Action B.3.1 and Required Action B.3.2.2.

D.1 Enter LCO 3.0.3 Immediately HBRSEP Unit No. 2 3.8-3 Amendment No. 44&

AC Sources-Operating 3.8.1 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One DG inoperable. B.1 Perform SR 3.8.1.1 for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the offsite circuit.

AND Once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter AND B.2 Declare required 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> from feature(s) supported by .discovery of the inoperable DG Condition B inoperable when its concurrent with required redundant inoperability of feature(s) is inoperable. redundant required feature(s)

AND B.3.1 Perform SR 3.8.1.2 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> OPERABLE DG OR B.3.2.1 Determine OPERABLE 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> DG is not inoperable due to common cause failure.

AND

--- ---------------- NOTE ------------------

Not required to be performed when the cause of the inoperable DG is pre-planned, preventive maintenance and testing. At any point during the pre-planned maintenance or testing, if any new failure requiring corrective maintenance is detected, Required Action B.3.2.2 must be entered for the OPERABLE DG. If the 96-hour Completion Time has expired at the point of discovery of the failure requiring corrective maintenance, (continued)

HBRSEP Unit No. 2 3.8-2 Amendment No.

AC Sources-Operating 3.8.1 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. (continued) then at the time of discovery Required Action B.3.1 must be entered for the OPERABLE DG.

96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> B.3.2.2 Perform SR 3.8.1.2 for OPERABLE DG.

AND 7 days B.4 Restore DG to OPERABLE status. AND 8 days from discovery of failure to meet LCO C. Required Action and C.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition A or B AND not met.

C.2 Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> D. Two or more AC sources ---------- NOTE ----------

inoperable. Entry into this Required Action may be delayed for no greater than 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> during performance of Required Action B.3.1 and Required Action B.3.2.2.

D.1 Enter LCO 3.0.3 Immediately HBRSEP Unit No. 2 3.8-3 Amendment No.

AC Sources - Operating B 3.8.1 BASES ACTIONS B.3.1. B.3.2.1. and B.3.2.2 (continued)

Required Action B.3.2.2 is satisfied. If the cause of the initial inoperable DG cannot be confirmed not modified by a NOTE that to exist on the remaining DG(s), performance of SR 3.8.1.2 suffices to removes the requirement to provide assurance of continued OPERABILITY of that DG.

verify the OPERABILITY of t:he OPERABLE DG within If it is verified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> that the OPERABLE DG is not inoperable 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> when the cause of due to common cause failure, SR 3.8.1.2 need not be performed within t:he initial inoperability is pre- 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. However, it is still necessary to verify the OPERABILITY of the

)lanned maintenance and OPERABLE DG within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br />. Testing: the OPERABLE DG more than plang In testing. Inethis thintenane, case, nono once during the 7 day Completion Time is not required.

t actual failure has occurred In/e event the inoperable DG is restored to OPERABLE status prior to i.e., a potential for a mpleting either B.3.1 or B.3.2, the plant corrective action program will common mode failure has continue to evaluate the common cause possibility. This continued not been identified) and the evaluation, however, is no longer under the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> constraint imposed ikelihood of the other DG while in Condition B.

having an undetected failure during this period is very low. According to Generic Letter 84-15 (Ref. 6), 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is reasonable driheiNOTEso to periovids vconfirm that the OPERABLE DG(s) is not affected by the same problem as The NOTE also provides the inoperable DG.

Jirection for the discovery of any new failure requiring corrective maintenance at B.4 any point during the pre-planned maintenance or Operation may continue in Condition B for a period that should not exceed testing of the DG being 7 days.

serviced or tested.

In Condition B, the remaining OPERABLE DG and offsite circuit are adequate to supply electrical power to the onsite Distribution System. The 7 day Completion Time'takes into account the capacity and capability of the remainingAC sources, a reasonable time for repairs, and the low probability of a DBA occurring during this period.

The second Completion Time for Required Action B.4 establishes a limit on the maximum time allowed for any combination of required AC power sources to be inoperable during any single contiguous occurrence of failing to meet he LCO. If Condition B is entered while, for instance, an offsite circuit is inoperable and that circuit is subsequently restored OPERABLE, the LCO may already have been not met for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This could lead to a total (continued)

HBRSEP Unit No. 2 B 3.8-9 Revision No.'0"

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