ML060330702
| ML060330702 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 02/15/2006 |
| From: | Jabbour K Plant Licensing Branch III-2 |
| To: | Crane C Exelon Generation Co |
| Jabbour K, NRR/DLPM, 415-1496 | |
| Shared Package | |
| ML060330719 | List: |
| References | |
| TAC MC6551 | |
| Download: ML060330702 (8) | |
Text
February 15, 2006 Mr. 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: ADDITION OF OSCILLATION POWER RANGE MONITOR (TAC NO. MC6551)
Dear Mr. Crane:
By letter dated January 26, 2006, the U.S. Nuclear Regulatory Commission issued Amendment No. 171 to Facility Operating License No. NPF-62. The amendment added technical specifications (TSs) containing operability requirements for the Oscillation Power Range Monitor (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 corrections are 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 of change 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, and 5.0-19) to delete the TS requirements to submit the monthly operating reports and annual occupational radiation exposure reports.
C. M. Crane Enclosed are the corrected pages. Please replace the pages in your copy of the amendment with 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 Regulation Docket No. 50-461
Enclosures:
As stated cc w/encl: See next page
C. M. Crane Enclosed are the corrected pages. Please replace the pages in your copy of the amendment with 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 Regulation Docket No. 50-461
Enclosures:
As stated cc w/encl: See next page DISTRIBUTION:
PUBLIC LPLIII-2 r/f RidsOGCRp RidsAcrsAcnwMailCenter HGarg GHill (2)
MRing, RIII AHowe RidsNrrDorlLplf THuang TBoyce DClarke GCranston RidsNrrPMKJabbour ADAMS Accession Number: ML060330702 TS Pages Accession Number: ML Package No.:ML060330719 OFFICE PM:LPL3-2 LA:LPD3-2 BC:DE/EICB BC:DSS/SBWB NAME KJabbour:mw DClarke (THarris for)
AHowe GCranston DATE 2/6/06 2/3/06 2/7/06 2/7/06 OFFICE BC: DIRS/ITSB OGC BC:DORL/LPL3-2(A)
NAME TBoyce AHodgdon MLandau DATE 2/7/06 2/9/06 2/15/06 OFFICIAL RECORD COPY applicable, but should include an uncertainty treatment that accounts for the number of failed sensors permitted by the TSs of the plants applicant.
The licensee stated that the methodology as described in NEDO-32465-A was followed 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 procedures specified in the approved methodology are used.
(c)
Implementation of Option III will require that the selected bypass region outside of 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 l
NEDO-31960) would define a curved region on the power to flow operating map cutting 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 l
consistent with the boundaries discussed in NEDO-32465-A, Section 2.2.
(d)
If the algorithms detect oscillations, an automatic protective action should be initiated. This action may be a full scram or a selected rod insert (SRI).
The licensee confirmed that the automatic protective action of the OPRMs at CPS will be a full reactor scram, rather than an SRI. The staff finds this acceptable 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 III algorithms are acceptable for the intended oscillation detection function. These LPRM 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 at CPS. The staff has reviewed the licensees 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 topical reports by addressing the actions identified in the staffs 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 for operation (LCO), Applicability, Actions and SRs necessary to define the operability of the OPRM channels, and the actions that must be taken by the plant operators when the instruments become inoperable. TS Section 3.3.1.3 requires 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 ACTIONS section 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 referenced topical reports.
(c)
SRs 3.3.1.3.1 through 3.3.1.3.6 have been added. There are some deviations from 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 into associated 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 to SR 3.3.1.3.3 to state that the setpoints for the trip function are specified in the l
COLR.
(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 associated references to the figure from the LCO 3.4.1, Actions B, C, D, and F, and SR 3.4.1.2, to revise/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 the manual 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 Solutions Licensing Basis Methodology for Reload Applications.
The staff has reviewed the proposed changes and finds them acceptable because NEDO-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 for OPRMs in the COLR.
Clinton Power Station, Unit 1 cc:
Senior Vice President of Operations AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Illinois Emergency Management Agency Division of Disaster Assistance &
Preparedness 110 East Adams Street Springfield, IL 62701-1109 Vice President - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Manager Licensing - Dresden, Quad Cities, and Clinton AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Regulatory Assurance Manager - Clinton AmerGen Energy Company, LLC Clinton Power Station RR3, Box 228 Clinton, IL 61727-9351 Director - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Document Control Desk - Licensing AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Site Vice President - Clinton Power Station AmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351 Clinton Power Station Plant Manager AmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351 Resident Inspector U.S. Nuclear Regulatory Commission RR #3, Box 229A Clinton, IL 61727 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Assistant General Counsel Exelon Generation Company, LLC 200 Exelon Way Kennett Square, PA 19348 R. T. Hill Licensing Services Manager General Electric Company 175 Curtner Avenue, M/C 481 San Jose, CA 95125 Chairman of DeWitt County c/o County Clerks Office DeWitt County Courthouse Clinton, IL 61727 J. W. Blattner Project Manager Sargent & Lundy Engineers 55 East Monroe Street Chicago, IL 60603