ML20024G591
| ML20024G591 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 02/28/1974 |
| From: | Larkin W NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML20024G589 | List: |
| References | |
| NUDOCS 9102130438 | |
| Download: ML20024G591 (7) | |
Text
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l'NITED STATES A'IOMIC ENERGY CO.WISSION NORTilERN STATES POWER Col! PAN; Monticello Nuclear Generating Plant Docket No. 50-263 REQUEST FOR AUT110RIZATION OP A CllANGE IN TECHNICAL SPECIPICATIONS Or APPENDIX A PROVISIONAL OPERATING LICENSE NO. DPR-22 (Change lu ouest Dat ed February 28, 1974)
?,orthern States Power Company, a Minnesota corporation, requests nothorization for chances to the Technical Specifications as shown on the a t t tw nnen t s labeled Exhibit A and Exhibit B.
Exhibit A describes the proposed chang s along with reasons for change. Exhibit B is a set of 'luhnical Specifict tion pens incorporating the proposed changer..
This request contains no restricted or other defense information.
NORTHERN STATES PO'iER COMPANY Mk hA:
cy Wade Larkin Group Vice President - Power Supply l
On this M h day of
(
m'!
,/'2%// before me a notary public dent - Power Supply, and being fiu/ppeared Wade Larkin, Group Vice Presi-in and for said County, personally j
st duly sworn acknowledged that he is authorized to execute this document in behalf of Northern States Power Corapa ny, that he knows the contents thereof and that to the ' est of his i
o knowledge, information and belief, the statements made in it are true and that it is not interposed for delay.
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- ' John J Smith L/'
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Ntaw FwW c Hem ep,r. County, Menm sus My Comm; non tipoes Manh 3,19 7 f.
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9102130438 740229 i
PDR ADOCK 05000263 p
s EXHIBIT A MONTICELID NL' CLEAR GENERATING PLANT Docket No. 50-263 i
CHANGE REQUEST DATED TEBRUARY 28, 1974 PROPOSED Cl!ANGES TO Tilt TECHNICAL SPECIFICA'10NS APPENDIX A 0F PROVISIONAL OPERATING LICENSE NO. DPR-22 Pursuert to 10CTR50.59, the holders of the above-mentioned license hereby propose the followng changes to Appendix A, Technical Specifications.
1.
PRO'3 SED CHANGE on page 108A, TS 3.5.J. change "...of 11.5 kw/f t." to read
"...shown in Figure 3.5.1."
REASON FOR CRANGE Feference 1 provides guidance on calculations 1 methods approved by the ALC Staf f for determining the effects of fuel densification.
Reference 2 discussed the applica' ion of these methods.
In applying these methods, the constant value for }%PLHGR becomes exposure-dependent as shown in rigure 3.5.1.
2.
PROPOSED CHANGE On page 108B. TS 3.5,.R. expand the lines:
"LHCRd = Design LHCR = 17.5 kw/f t (A P/P) max = Maximum power spiking penalty = 0.036" to read as follows:
"LHGRd= Design LHCR
= 17.5 kw/ft for 7x7 fuel 13.4 kw/ft for 8x8 fuel
=
(ZhP/P) mar = Maximum power spiking penalty
= 0.033 for 7x7 fuel
= 0.024 for 8x8 fue
_ REASON FOR CRANCT This change expands the Specification to include the design LHGR of 8x8 fuel as discussed in Reference 3.
The calculated power spike pt Telty for 8x8 fuel is discussed in Reference 4 and the recalculated penalty for 7x7 fuel is discussed in Reference 5.
Thece references show the power spike penalty as.a function of length for various pellet densities.
The following is a tabulation of data pertinent to tbnticello fuel types:
i EX511 BIT A 2
Fuel Type
% of T.D (th P/P) max Initial Core (7x7) 95.04 0.033 j
Reload-1 (7x7) 94.94 0.033 Reload-2 (8x8) 95.44 0.024 t
3.
PROPOSED CHANGT Insert a new page, 108C. designated Figure 3.5.1.
REARON FOR CHANCE This figure is the result of the recalculation described in Item 1, above.
The cerves are a composite of two limiting conditions; LUGR for low exposures and peak cladding temperature during LOCA for higher exposures.
Figures A-1 through A-3 of this exhibit are included to provide i.
additional information in this rugard.
The alpha curve shows the MAPLHCR based on design LHGR limitations only.
The omega curve is the composite i
limitation; it becomes more restrictive than the alpha curve when the i
i calculated LOCA peak cladding temperature reaches the current limit of 23003r.
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4.
_1cPOSED ClW:Cr<
i, On page 113A. TS Bases 3.5.J, replace the third paragraph with i
the words, "The maximum average planar LHGR curves shown in l
Tirure 3.5.1 were calculated for the various Monticello fuel i
types in the manner discussed in Section 4.3 of General Electric l
topical report, 'DEGAP-III:
A Model for the Prediction of Pellet-l Cladding Thermal Cotiduc tance in HWR Fuel Rods" NEDO-20181, I
Revision 1, November 1973., These curves show the composite i
limitation based on the design LHGR of the fuel and the peak cladding temperature in the event of a LOCA.
Calculations are based on the AEC " Modified CE Fbdel for Fuel Densification" 4
attached to a December 5,1973 letter from D J Skovholt (USAEC) to L 0 Fbyer (NSP). "
i On page 113A, TS Bases 3.5.J. fourth paragraph, ninth line, replace the words "...on the order of only..." with "... less l
than..."
On page 113A, TS Bases 3.5.J. last line, change the words
" Changes in gap size... " to " Changes in radial gap size... "
On page 113B, TS Bases 3.5.J. replace the last three sentences of the first paragraph with the words, "As' discussed in NEDO-20181, that the pellet densified from its measured value to 96.5% of theoretical density."
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EXillBfT A 1
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EXIIIBIT A 5-CURVE OL - MAXIMUM ALI/rJABLE TO STAY BE104 CURRENT TECl!NICAL SPECIFICATION LIMIT FOR LHGR CURVE O - MAXIMUM ALLCfJABLE WIni CECAP III*AND AEC IODIFICATIONS 1
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l Figure A-2 Manticello Reload-1 Fuel (7x7);
HAPLHGR and PCT vs Exposure
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EXHIBIT A.
f CURVE OL-MAXIMUM ALIhWABLE ID STAY BEWJ CURRENT TECHNICAL SPECIFICATION LIMIT FOR IJiGR CURVE C,- MAXIWM ALIDWABLE WITH CECAP III AND AEC N0DIFICATIONS 13 t;'
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D F
OtI ET T B
'Ihis exhibit consists of the following pages revised to incorporate the proposed changes:
1 Page 108A Page 10BB Page 108C Page 113A Page 113B s
_N NI II I