ML13085A096

Corrected Technical Specification (TS) and Safety Evaluation Pages for Amendment No. 245, Revise TS 3.4.9, RCS Pressure and Temperature (P/T) Limits, to Revise Limit Curves and Surveillance Requirements

ML13085A096
Person / Time
Site:	Cooper
Issue date:	03/29/2013
From:	Lynnea Wilkins Plant Licensing Branch IV
To:	Limpias O Nebraska Public Power District (NPPD)
Wilkins L
References
TAC ME7324
Download: ML13085A096 (8)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 29, 2013 Mr. Oscar A. Limpias Vice President-Nuclear and CNO Nebraska Public Power District 72676 648A Avenue Brownville, NE 68321

SUBJECT:

COOPER NUCLEAR STATION -CORRECTION TO TECHNICAL SPECIFICATION AND SAFETY EVALUATION PAGES FOR AMENDMENT NO. 245 RE: REVISIONS TO TECHNICAL SPECIFICATION 3.4.9, "RCS PRESSURE AND TEMPERATURE (PrT) LIMITS," FOR 32 EFFECTIVE FULL POWER YEARS (TAC NO. ME7324)

Dear Mr. Limpias:

By letter dated February 22, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13032A526), the U.S. Nuclear Regulatory Commission (NRC, the Commission) issued Amendment No. 245 to Renewed Facility Operating License No. DPR-46 for the Cooper Nuclear Station, in response to your application dated September 22, 2011, as supplemented by letters dated March 30, September 10, and September 28,2012, and January 3, 2013 (ADAMS Accession Nos. ML11272A057, ML12094A118, ML12258A072, ML12278A138, and ML13008A181, respectively). The amendment revised Cooper Nuclear Station's Technical Specification (TS) 3.4.9, "RCS [Reactor Coolant System] Pressure and Temperature (PrT) Limits," regarding the current 28 effective full power year (EFPY) pressure temperature (P-T) limit curves with new curves that are valid for 32 EFPY. The proposed 32 EFPY P-T limit curves were developed based on the consideration of a measurement uncertainty recapture power uprate that was approved with the issuance of Amendment No. 231 dated June 2,2008 (ADAMS Accession No. ML081540278).

As noted in discussions with your staff, the safety evaluation issued with the amendment cited 3 incorrect P-T limit curves. The safety evaluation cites the P-T curves in Figures 3.4.9-1,3.4.9-2, and 3.4.9-3 that were submitted by letter dated September 28,2012. By letter dated January 3, 2013, the licensee withdrew the aforementioned P-T curves and requested the NRC to approve the original license amendment request submitted on September 22, 2011. The NRC staff did evaluate and issue Amendment No 245 based upon the P-T curves in the September 22, 2011, submittal, as requested, and this was an administrative oversight by the NRC staff and does not affect the NRC staffs overall conclusions associated with Amendment No. 245.

Enclosed are the corrected TS pages 3.4-23, 3.4-24, and 3.4-25 for Figures 3.4.9-1, 3.4.9-2, and 3.4.9-3, respectively, and page 5 of the safety evaluation to be included with the issued amendment. We regret any inconvenience this may have caused.

O. Limpias - 2 In addition, by email datedMarch27.2013.Mr. Edward McCutchen of your staff requested a 30 day extension, from the date of this letter, to implement Amendment 245 due to competing activities associated with License Renewal implementation efforts. The NRC staff concludes that this extension is acceptable.

If you have any questions, please contact me at 301-415-1377 or via e-mail at Iynnea. wilkins@nrc.gov.

Sincerely, d --I i /

' '\J-/l'-""./~( I

.~

.' Lynnea E. Wilkins, Project Manager Plant Licensing Branch IV Division of Operating Reactor licensing Office of Nuclear Reactor Regulation Docket No. 50-298

Enclosure:

Revised TS and SE pages cc w/encl: Distribution via Listserv

ENCLOSURE REVISED TECHNICAL SPECIFICATION PAGES 3.4-23, 3.4-24, AND 3.4-25, AND SAFETY EVALUATION PAGE 5 FOR AMENDMENT NO. 245 DATED FEBRUARY 22,2013

RCS PIT limits 3.4.9 Cooper Heatup/Cooldown, Core Not Critical Curve (Curve B), 32 EFPY Safe Operating o ~~~~-+~~-+~~~~~~~~~~~~~~~~~~

., 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 MINIMUM REACTOR VESSEl METAL TEMPERATURE (Of)

Figure 3.4.9-1 PressurelTemperature limits* for Non-Nuclear Heatup or Cooldown Following Nuclear Shutdown Valid Through 32 EFPY Cooper 3.4-23 Amendment No. 245

Res PIT Limits 3.4.9 Cooper Pressure Test Curve (Curve A), 32 EFPY 300 8oI-up Temp:

>70 F 200 100 0

0 20 40 80 80 100 120 140 180 180 200220 240 260 280 300 320 340 MINIMUM REACTOR VESSel METAl TEMPERAllJRE rFJ Figure 3.4.9-2 PressurelTemperature Limits for Inservice Hydrostatic and Inservice leakage Tests Valid Through 32 EFPY Cooper 3.4-24 Amendment No. 245

RCS PfT Limits 3.4.9 Cooper Haatup/Cooldown, Core Critical Curve (Curve C), 32 EFPY 1.100 +-to-+

1,000 +-1-+--+-+-+

i

.I m~ ~-+~~~~+-~~+-

~800 +----+-+--+

~700 i

...1600 +-+-+-1

..I i~500 f--+-,o+-+-+

~ ~~~+-~~+-~-+~~-+~~~

MintmumCore CritIcal Temperature:

> serF ~,-J;:f:t::f:

~~~80~m~~~~m~~_B~~

MINIMUM REACTOR VESSEL METAl TEMPERATURE (OF)

Figure 3.4.9-3 PressurefTemperature Limits for Criticality Valid Through 32 EFPY Cooper 3.4-25 Amendment No. 245

-5 shall reflect consideration of service temperatures and other conditions of the boundary material under operating, maintenance, testing, and postulated accident conditions and the uncertainties in determining (1) material properties, (2) the effects of irradiation on material properties, (3) residual, steady state and transient stresses, and (4) size of flaws.

3.0 TECHNICAL EVALUATION

3.1 Proposed TS Changes By letter dated September 22, 2011, as supplemented by letter dated September 28, 2012, the licensee proposed the following revisions to TS 3.4.9 requirements for the RCS P-T limits:

• TS Figure 3.4.9-1, "PressurelTemperature limits for Non-Nuclear Heatup or Cooldown Following Nuclear Shutdown," will be revised to include new P-T limits for heat-up and cool-down operations with the core not critical that are valid through 32 EFPY. For a markup of proposed changes to TS Figure 3.4.9-1. see Attachment 2 of the licensee's letter dated September 22, 2011.

• TS Figure 3.4.9-2, "PressurelTemperature limits for Inservice Hydrostatic and Inservice Leakage Tests," will be revised to include new P-T limits for pressure test conditions that are valid through 32 EFPY. For a markup of proposed changes to TS Figure 3.4.9-2. see Attachment 2 of the licensee's letter dated September 22, 2011.

• TS Figure 3.4.9-3. "PressurelTemperature limits for Criticality," will be revised to include new P-T limits for heat-up and cool-down operations, with the core critical that are valid through 32 EFPY. For a markup of proposed changes to TS Figure 3.4.9-3, see Attachment 2 of the licensee's letter dated September 22, 2011.

• SRs 3.4.9.5,3.4.9.6, and 3.4.9.7 will be revised to reflect the decrease in the minimum bolt-up temperature value from 80 OF to 70 OF, as specified for the proposed 32 EFPY P-T limits for pressure test and core not critical conditions.

The NOTES in SR 3.4.9.6 and SR 3.4.9.7 for MODE 4 (cold shutdown) will also be changed to reduce by 10°F the points at which the surveillances are required to be performed in order to maintain the same margins from the minimum operating parameters.

Specifically, current SRs 3.4.9.5, 3.4.9.6, and 3.4.9.7 state that Verify reactor vessel flange and head flange temperatures are

> 80°F.

O. limpias -2 In addition, by email datedMarch27.2013.Mr. Edward McCutchen of your staff requested a 30 day extension, from the date of this letter, to implement Amendment 245 due to competing activities associated with License Renewal implementation efforts. The NRC staff concludes that this extension is acceptable.

If you have any questions, please contact me at 301-415-1377 orvia e-mail at Iynnea. wilkins@nrc.gov.

Sincerely, IRA!

Lynnea E. Wilkins, Project Manager Plant licensing Branch IV Division of Operating Reactor licensing Office of Nuclear Reactor Regulation Docket No. 50-298

Enclosure:

Revised TS and SE pages cc w/encl: Distribution via listserv DISTRIBUTION:

PUBLIC RidsNrrLAJBurkhardt Resource LPLIV r/f RidsNrrPMCooper Resource RidsAcrsAcnw_MailCTR Resource RidsRgn4MailCenter Resource RidsNrrDorlDpr Resource BParks, NRR/DSS/SRXB RidsNrrDorlLpl4 Resource RGrover, NRRIDSS/STSB RidsNrrDssSrxb Resource JPoehler, NRR/DE/EVIB RidsNrrDeEvib Resource CSydnor, NRR/DE/EVIB RidsNrrDssStsb Resource ADAMS Accession No. ML13085A096 OFFICE NRR/DORlILPL4/PM NRR/DORlILPL4/LA NRRlDORULPL4/BC NRR/DORULPL4/PM MMarkley (JPolickoski NAME LWilkins JBurkhardt for) LWilkins DATE 3/27113 3127/13 3129/13 3/29/13 OFFICIAL RECORD COpy