ML110040168

Request for Additional Information Related to the License Amendment Request for Modification of TS 2.1.1, Reactor Core Sls.

ML110040168
Person / Time
Site:	Perry
Issue date:	01/06/2011
From:	Michael Mahoney Plant Licensing Branch III
To:	Bezilla M FirstEnergy Nuclear Operating Co
mahoney, m NRR/DORL/LPLIII-2 415-3867
References
Download: ML110040168 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 January 6, 2011 Mr. Mark B. Bezilla Site Vice President FirstEnergy Nuclear Operating Company Perry Nuclear Power Plant Mail Stop A-PY-A290 P.O. Box 97,10 Center Road Perry,OH 44081-0097

SUBJECT:

PERRY NUCLEAR POWER PLANT, UNIT NO.1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE LICENSE AMENDMENT REQUEST FOR MODIFICATION OF TECHNICAL SPECIFICATION 2.1.1, "REACTOR CORE SLS" (TAC NO. ME4925)

Dear Mr. Bezilla:

By letter to the Nuclear Regulatory Commission (NRC) dated October 21,2010 (Agencywide Documents Access and Management System Accession No. ML102980451), FirstEnergy Nuclear Operating Company (FENOC or the licensee), submitted a license amendment request for modification of Technical Specification 2.1.1, "Reactor Core SLs," for the Perry Nuclear Power Plant, Unit No.1.

The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. During a discussion with your staff on December 28, 2010, it was agreed that you would provide a response within 30 days from the date of this letter.

The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRC's goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-3867.

7frlJJ Michael Mahoney, Project Plant Licensing Branch 111-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-440

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION PERRY NUCLEAR POWER PLANT, UNIT NO, 1 DOCKET NO. 50-440 The Nuclear Regulatory Commission (NRC) staff has reviewed the October 21, 2010 (Agencywide Documents Access and Management System Accession No. ML102980451),

FirstEnergy Nuclear Operating Company submittal regarding changes to the Perry Nuclear Power Plant Cycle 14 Safety Limit Minimum Critical Power Ratios (SLMCPRs). The NRC staff has determined that the following information is needed in order to complete its review:

1. Please provide:

(a)The number of fuel assemblies for each fuel type in Figures 1 and 2 for Cycle 14 and Cycle 1.

(b) Core map to show those bundles experienced 0.1 percent boiling transition criterion of limiting cases for single loop operation (SLO) and two-loop operation (TLO).

2. Please provide the details of a final core loading pattern as shown in Figure 1 including procedures, guidelines, criteria, and approved methodologies used for this analysis.

3. Please provide:

(a) An approximation of the correlation for MCPR Importance Parameter (MIP) and R-Factor Importance Parameter (RIP) including applicable fuel related coefficients and constants leading to the results of TLO SLMCPR estimate using the MIP/RIP correlation shown in Table 3.

(b) Justification that the approximation is still applicable to GE 14 fuel considering there are no GE14 data points in Figure 5.

(c) An updated Figure 5 including GE14 fuel assembly.

4. In Section 2.1 of Enclosures Band C "Major Contributors to SLMCPR Changes," it states that "Table 3 presents estimated impacts on the TLO SLMCPR due to methodology deviations, penalties. and/or uncertainties deviations from approved values." Please provide:

(a) Calculation details about how the impact on the SLMCPR from R-factor of less than 0.005 and from core flow rate of 0.003 is generated in Table 3.

(b) Justification that the proposed SLMCPR values for TLO and SLO are conservative related to "methodology deviations, penalties, and/or uncertainties deviations from approved values," or any fuel related Part 21 issues not listed in Table 3.

5. Please provide an updated version of power/flow map for Cycle 14 operation including stability Option III features of scram region and controlled entry region for back up stability protection.

Enclosure

January 6, 2011 Mr. Mark B. Bezilla Site Vice President FirstEnergy Nuclear Operating Company Perry Nuclear Power Plant Mail Stop A-PY-A290 P.O. Box 97,10 Center Road Perry,OH 44081-0097

SUBJECT:

PERRY NUCLEAR POWER PLANT, UNIT NO.1 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE LICENSE AMENDMENT REQUEST FOR MODIFICATION OF TECHNICAL SPECIFICATION 2.1.1, "REACTOR CORE SLS" (TAC NO. ME4925)

Dear Mr. Bezilla:

By letter to the Nuclear Regulatory Commission (NRC) dated October 21,2010 (Agencywide Documents Access and Management System Accession No. ML102980451), FirstEnergy Nuclear Operating Company (FENOC or the licensee), submitted a license amendment request for modification of Technical Specification 2.1.1, "Reactor Core SLs," for the Perry Nuclear Power Plant, Unit NO.1.

The NRC staff is reviewing your submittal and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. During a discussion with your staff on December 28, 2010, it was agreed that you would provide a response within 30 days from the date of this letter.

The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRC's goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-3867.

Sincerely, IRA!

Michael Mahoney, Project Manager Plant Licensing Branch 111-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-440

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

PUBLIC LPL3-2 R/F RidsNrrDorlLpl3-2 Resource RidsNrrPMPerry Resource RidsNrrLATHarris Resource RidsAcrsAcnw_MailCTR Resource RidsOgcRp Resource RidsRgn3MailCenter Resource RidsNrrDorlDpr Resource ADAMS A ccesslon

. No. ML110040168 *BjY Memo Dtd ae NRR -088 OFFICE LPL3-2IPM LPL3-2/LA DSS/SRXB/BC LPL3-2/BC LPL3-2IPM NAME MMahoney THarris AUlses RCarlson MMahoney DATE 01/04/11 01/04111 12129/10* 01106/11 01/06/11 OFFICIAL RECORD COPY