ML20059G649

Amend 156 to License DPR-40,revising TS 2.10.4 to Establish Limit for cold-leg Temp to Maintain Departure from Nucleate Boiling Ratio Margin During Power Operation Above 15% of Rated Power

ML20059G649
Person / Time
Site:	Fort Calhoun
Issue date:	10/29/1993
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20059G632	List: ML20059G628 ML20059G649 ML20059G660
References
NUDOCS 9311080283
Download: ML20059G649 (2)

Text

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I ATTACHMENT TO LICENSE AMENDMENT NO. 156 FACilllY OPERATING LICENSE NO. OPR-40 ,

i DOCKET NO. 50-285 Revise Appendix "A" Technical Specifications as indicated below. The revised page is identified by amendment number and contains vertical lines indicating the area of change.

l REMOVE PAGE INSERT PAGE  !

l 2-57c 2-57c l 1

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1 9311080283 931029

• PDR ADOCK 05000285 .

P PDR

g 2.0 LIMITING CONDITIONS FOR OPERATION 2.10 Reactor Core (Continued) ,

2.10.4 Power Distribution Limits (Continued)

(5) DNBR Marrin During Power Ooeration Above 15% of Rated Power (a) The following DNB related parameters shall be maintained within the limits, shown: '

(i) Cold Leg Temperature (1) l (ii) Pressurizer Pressure 12075 psia *

(iii) Reactor Coolant Flow 1197,000 gpm" .

Axial Shape Index, Y, I (iv) (2)

(b) With any of the above parameters exceeding the limit, restore the parameter to within its limit within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or reduce power to less than 15 % of rated power within the next  ;

8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. l l

Bas 11 i

l The limitation on linear heat rate ensures that in the event of a LOCA, the peak temperature of the i fuel cladding will not exceed 2200'F.

Either of the two core power distribution monitoring systems, the Excore Detector Monitoring System, or the Incore Detector Monitoring System, provide adequate monitoring of the core power l distribution and are capable of verifymg that the linear heat rate does not exceed its limit. The l Excore Detector Monitoring System performs this function by continuously monitoring the axial j shape index with the operable quadrant symmetric excore neutron flux detectors and verifying that l the axial shape index is maintained within the allowable limits of the Limitirg Condition for  ;

l Operation for Excore Monitoring of LHR Figure provided in the COLR as adjusted by Specification J 2.10.4(1)(c) for the allowed linear heat rate of the Allowable Peak Linear Heat Rate vs. Burnup Figure provided in the COLR, RC Pump configuration, and F y T of the FaT, F yT and Core Power Limitations Figure provided in the COLR. In conjunction with the use of the excore monitoring l system and in establishing the axial shape index limits, the following assumptions are made: (1) the l CEA insertion limits of Specification 2.10.l(6) and long term insertion limits of Specification 1 2.10.l(7) are satisfied, (2) the flux peahng augmentation factors are as shown in Figure 2-8, and (3) the total planar radial peaking factor does not exceed the limits of Specification 2.10.4(3). l Limit not applicable during either a thermal power ramp in excess of 5 % of rated thermal power i per minute or a thermal power step of greater than 10% of rated thermal power.

" This number is an actual limit and corresponds to an indicated flow rate of 202,500 gpm. All other values in this listing are indicated values and include an allowance for measurement l uncertainty (e.g.,543*F, indicated, allows for an actual T, of 545'F). l (1) Within the limit for Core Inlet Temperature provided in the COLR.

(2) Within the Limiting Condition for Operation for DNB Monitoring Figure provided in the COLR.

2-57c Amendment No. 32,43,57,70,

'",92,l "),117,141, 156

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