ML060330702

Correction Letter Addition of Oscillation Power Range Monitor

ML060330702
Person / Time
Site:	Clinton
Issue date:	02/15/2006
From:	Jabbour K N Plant Licensing Branch III-2
To:	Crane C M Exelon Generation Co
Jabbour K, NRR/DLPM, 415-1496
Shared Package
ML060330719	List: ML060330702
References
TAC MC6551
Download: ML060330702 (8)

Text

February 15, 2006Mr. Christopher M. Crane, President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555

SUBJECT:

CLINTON POWER STATION, UNIT 1 - CORRECTION LETTER RE: ADDITIONOF OSCILLATION POWER RANGE MONITOR (TAC NO. MC6551)

Dear Mr. Crane:

By letter dated January 26, 2006, the U.S. Nuclear Regulatory Commission issued AmendmentNo. 171 to Facility Operating License No. NPF-62. The amendment added technicalspecifications (TSs) containing operability requirements for the Oscillation Power R angeMonitor (OPRM), associated surveillance requirements (SRs), and a core operating limits report OPRM requirement.Subsequent to the issuance of the amendment, it was brought to our attention that correctionsare needed to the safety evaluation (SE) supporting the issuance of the amendment, and to include revised TS pages 3.3-14a, 3.3-14b and 5.0-18. On page 5 of the SE, paragraph (c),SR 3.3.1.3.5 should have been referenced twice in lieu of SR 3.3.1.3.4; and on page 8,paragraph (c), SR 3.3.1.3.3 should have been referenced in lieu of SR 3.3.1.3.2. The areas ofchange are identified by lines in the margin for SE pages 5 and 8. Revised TS pages 3.3-14a and 3.3-14b were submitted by letter dated September 23, 2005, in response to a request for additional information. In addition, revised TS page 5.0-18 should be included because of a page shift that occurred due to the issuance of an amendment dated May 20, 2005 (ML050970046), while the OPRM amendment request was dated April 1, 2005. The amendment dated May 20, 2005, revised TS Section 5.0 (i.e., pages 5.0-17, 5.0-18, and5.0-19) to delete the TS requirements to submit the monthly operating reports and annualoccupational radiation exposure reports.

C. M. Crane-2-Enclosed are the corrected pages. Please replace the pages in your copy of the amendmentwith the enclosed pages. We apologize for any inconvenience that may have been caused by this administrative oversight. Sincerely,/RA/Kahtan N. Jabbour, Senior Project ManagerPlant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-461

Enclosures:

As stated cc w/encl: See next page C. M. Crane-2-Enclosed are the corrected pages. Please replace the pages in your copy of the amendmentwith the enclosed pages. We apologize for any inconvenience that may have been caused by this administrative oversight. Sincerely,/RA/Kahtan N. Jabbour, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-461

Enclosures:

As stated cc w/encl: See next pageDISTRIBUTION

PUBLICLPLIII-2 r/fRidsOGCRpRidsAcrsAcnwMailCenterHGargGHill (2)MRing, RIIIAHoweRidsNrrDorlLplfTH uangTBoyceDClarkeGCranstonRidsNrrPMKJ abbourADAMS Accession Number: ML060330702TS Pages Accession Number: ML Package No.:ML060330719OFFICEPM:LPL3-2LA:LPD3-2BC:DE/EICBBC:DSS/SBWBNAMEKJabbour:mwDClarke(THarris for)AHoweGCranstonDATE2/6/062/3/062/7/062/7/06OFFICEBC: DIRS/ITSBOGCBC:DORL/LPL3-2(A)NAMETBoyceAHodgdonMLandau DATE2/7/062/9/062/15/06OFFICIAL RECORD COPY applicable, but should include an uncertainty treatment that accounts for thenumber of failed sensors permitted by the TSs of the plant's applicant.The licensee stated that the methodology as described in NEDO-32465-A wasfollowed for the PBDA including the analysis of sensor failure in the OPRM system, the cycle-specific analysis for the applicability of the scram setpoints,and the OPRM system operability. This is acceptable because the proceduresspecified in the approved methodology are used. (c) Implementation of Option III will require that the selected bypass region outsideof which the detect and suppress action is deactivated be defined in the TSs.The licensee confirmed that this region is included in surveillance requirement(SR) 3.3.1.3.5. The exclusion region methodology (safety analyses contained in lNEDO-31960) would define a curved region on the power to flow operating mapcutting across the corner of the map near the intersection of the natural circulation line and the highest flow control line. The staff finds this acceptable because the proposed exclusion region in conjunction with SR 3.3.1.3.5 is lconsistent with the boundaries discussed in NEDO-32465-A, Section 2.2. (d) If the algorithms detect oscillations, an automatic protective action should beinitiated. This action may be a full scram or a selected rod insert (SRI).The licensee confirmed that the automatic protective action of the OPRMs atCPS will be a full reactor scram, rather than an SRI. The staff finds thisacceptable because the action is in compliance with GDCs 10 and 12. (e)The LPRM groupings defined in NEDO-31960-A to provide input to Option IIIalgorithms are acceptable for the intended oscillation detection function. TheseLPRM groupings are the oscillation power range monitor for Option III.

The licensee stated that the LPRM assignments in Appendix D of NEDO-32465-A are identified as examples of the expected LPRM assignments that a licensee may choose without identifying the configuration which is used atCPS. The staff has reviewed the licensee's description and finds it acceptable because the configuration chosen is provided as one of the examples in NEDO-32465-A and NEDO-31960-A. However, the final configuration should be documented.

The staff finds that the licensee has adequately demonstrated the applicability of the topicalreports by addressing the actions identified in the staff's SERs approving the topical reports.3.Provide a plant-specific TS for the OPRM functions consistent with CENPD-400-P,Appendix A.In its submittal, the licensee stated that the proposed TS is consistent with CENPD-400-P, Appendix A, except for the following deviations: (a)A new TS for the OPRM instrumentation, which includes the limiting condition foroperation (LCO), Applicability, Actions and SRs necessary to define theoperability of the OPRM channels, and the actions that must be taken by theplant operators when the instruments become inoperable. TS Section 3.3.1.3requires four channels of the OPRM instrumentation to be operable when reactor power is 21.6 percent RTP. In addition, a note was added in the ACTIONSsection which states that "Separate Condition entry is allowed for each channel."(b)LCOs A, B and C have been added which are consistent with the referencedtopical reports.(c)SRs 3.3.1.3.1 through 3.3.1.3.6 have been added. There are some deviationsfrom the referenced topical reports which are addressed in Section 3.2 of this safety evaluation. A note is added which states that "When a channel is placed in an inoperable status solely for performance of required Surveillance, entry intoassociated Conditions and Required Actions may be delayed for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> provided the OPRM maintains trip capability." Also, a statement is added toSR 3.3.1.3.3 to state that the setpoints for the trip function are specified in the lCOLR. (d)Pages B 3.3-39a through B 3.3-39k have been added to provide the Bases for TS Section 3.3.1.3.(2)Revise TS Section 3.4.1, "Recirculation Loop Operating"The licensee proposed to delete Figure 3.4.1-1, "Power versus Flow," and associatedreferences to the figure from the LCO 3.4.1, Actions B, C, D, and F, and SR 3.4.1.2, torevise/renumber Actions E and G, and to add new Condition C with associated Action C1. The staff has reviewed the proposed changes and finds them acceptable because themanual operator actions specified in TS LCO 3.4.1 (and its associated Conditions B, C, D, and F; Actions B.1, C.1, D.1, F.1, G.1, and G.2; and SR 3.4.1.2) are no longer in use due to the automatic functions provided by the OPRM. (3)Revise TS Section 5.6.5, "Core Operating Limits Report (COLR)"The licensee proposed to add: (1) a new TS 5.6.5.a.5 "Oscillation Power Range Monitor(OPRM) Instrumentation;" and (2) a reference was added in TS 5.6.5.b. which is NEDO 32465, "BWR Owners' Group Reactor Stability Detect and Suppress SolutionsLicensing Basis Methodology for Reload Applications." The staff has reviewed the proposed changes and finds them acceptable becauseNEDO-32465 is an approved licensing topical report to support the new proposed TS 3.3.1.3 for determining the setpoint values of the applicable operating limits forOPRMs in the COLR.

Clinton Power Station, Unit 1 cc:

Senior Vice President of OperationsAmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555Illinois Emergency Management Agency Division of Disaster Assistance &

Preparedness 110 East Adams Street Springfield, IL 62701-1109Vice President - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555Manager Licensing - Dresden, Quad Cities, and ClintonAmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555Regulatory Assurance Manager - ClintonAmerGen Energy Company, LLC Clinton Power Station RR3, Box 228 Clinton, IL 61727-9351Director - Licensing and Regulatory AffairsAmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555Document Control Desk - LicensingAmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555Site Vice President - Clinton Power StationAmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351Clinton Power Station Plant M anagerAmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351Resident InspectorU.S. Nuclear Regulatory Commission RR #3, Box 229A Clinton, IL 61727Regional Administrator, Region IIIU.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville RoadLisle, IL 60532-4351Assistant General CounselExelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348R. T. HillLicensing Services Manager General Electric Company 175 Curtner Avenue, M/C 481 San Jose, CA 95125Chairman of DeWitt Countyc/o County Clerk's Office DeWitt County Courthouse Clinton, IL 61727J. W. BlattnerProject Manager Sargent & Lundy Engineers 55 East Monroe Street Chicago, IL 60603