ML20024G715

Responds to Re Shutdown Margin Testing

ML20024G715
Person / Time
Site:	Monticello
Issue date:	08/06/1973
From:	Wachter L NORTHERN STATES POWER CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9104250460
Download: ML20024G715 (6)

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NORTNERN STATES POWER COMPANY MIN N E APO Li m. M t N N E SOTA B 54o1

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Dear Mr. Grier:

NONTICELI4 NUCISAR CENERATING FIANT Docket No. 50-263 Licese No. DPR-22 Response to July 26,197314tter on Shutdown Margin Testing on August 3, 4 and 5,1973, Shutdown Harnin Verification tests were ecrapieted on all 121 control rods at the Monticc11o Daelear Generating Plant as stipu-lated in the July 26, 1973 letter frena B B Grier to L J Wachter. Rese tests were perforraed in accordance with the AEC criteria prebented in our August 2,1973 telephone conversat.Lon documented in an August 3,1973 letter frema D L Etemann to L 0 Mayer. % ese criteria required dennonstrating a shutdown margin of 0.75% delta k with allowance for transient xenon and samaritus so long as no amore than two control rods were withdruun fums the fully inserted post.Lon. Testing of peripheral rods cosamenced 77 hours8.912037e-4 days <br />0.0214 hours <br />1.273148e-4 weeks <br />2.92985e-5 months <br /> after the July 31, 1973 shutdown. Subcriticality was verified for each test condition.

Attached is a tabulation of 199 shutdown margin d*=mmtrations, some rods being tasted more than once. The tests are grouped into three cat *Eories:

Tuo Rod Out testa shodthat two adjacent CODtrol Inds TED could be fully withdrawn while maintainJng subcriticality.

This was done on the periphery where indiviqutt rod worths are very anali.

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RSP Calculations taere done by NSP prior to receiving the final AEC criteria. Tests were specified to demonstrate greater than or equal to 1% delta k abutdown margin with anc rod out.

The transient zanon and samarium was less than 0.257, detta k at the time of these tests so the AEC criteria vers satisfied.

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l GE calculations were likeurise done by CE prior to receiving ABC criteria. Their tr_ats were designed to demonstrate a shutdown margin of greater than or equal to 1.27A delta k with one rod out.

This larger margin was chosen to allow testing to be done at sodar-ator temperatures op to 125'F tahich adds a naastivity reactivity of up to 0.20% detta k.

Testing aus done with moderstor temperatures between 95 and 1000F dtich involves no significanc $ange in reactivity from the cold condition. Transient =*** and samarium wa less than 0.25% delta k during these tests also such that ABC criteria were satisfied.

Should thers be any questions regarding the tabulated test results, please feel fue to contact us.

Yours very truly,

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LJ achter Vice President -

Power Production & System Operation IJU/br cc: D L Zin=*=

c charnoff Nian* nota Poilution control Agency Atta: K Dzugan l

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IESULis OF N(NTICELLO SHUIDCW i

i, MAJtsis VE11FICATImr 'IESTs. AUCDST 3-5. 1973 Test Rod Fully Ad.jacent mod Mo.

Withdrawn Location Position __

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1 22-51 26-47 08 m

1 2

22-51 26-51 48 TRO 3

26-51 30-47 08 GE 4

26-51 30-51 48 Tao 5

30-51 26-47 06 (a

6 14-47 18-43 08 GE 7

14-47 18-47 48 DO 8

18-47 22-43 08 CE 9

22-47 18 43 10 NSF 10 26-47 22-43 10 NSP 11 30-47 34-43 10 NSP 12 34-47 30-43 08 CE 13 34-47 38-47 48 11to 14 38-47 34-43 08 GE t

15 10-43 14-39 48 110 16 14-43 18-39 14 CE/NSP 17 18-43 22-39 14 GE 18 22-43 26-39 48 GE 19 22-43 26-47 06 NSP 20 26-43 30-39 48 GE 21 26-43 22-47 06 E5P 22 30-43 26-39 48 m

23 30-43 26-47 06 NSP 24 34-43 30-39 14 CE 25 38-43 34-39 14 CE/Nsr 26 42-43 38-39 48 nto 27 06-39 10-35 08 CE 28 06-39 06-35 48 TKOf 29 10-39 14-35 14 CE/NEP 30 14-39 18-35 14 2

31 14-59 10-35 08 NSP 32 18-39 22-35 14 CE 33 18-39 14-43 06 R5P 34 22-39 26-35 14 CE 35 22-39 18-43 08 NSP 36 26-39 30-35 14 GE 37 25-39 22-35 08 NSF 38 30-39 26-35 14 GE 39 30-39 34-43 08 WSP 40 34-39 30-35 14 m

41 34-39 38-43 06 NSP 2

42 38-39 34-35 14 GE 43 38-39 42-35 08 NSF 44 42-39 38-35 14 GFJNSP 45.

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Adjacet Bad Test Rod Polly [

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Witladrauq Location Positio_n Caessets 4

48 10-35 14-3 1 14 GE 49 14-35 18-31 14 GE 50 14-35 10-39 06 NEF 51 18-35 22-31 48 GE 52 18-35 14-39 08 NEF 53 22-35 26-31 48 W/

54 21-35 16-39 10 ESP 55 26-35 i

30-31 44 GE 56 26-35 22-39 08 N8P r.J.

57 30-35 26-31 58 30-35 34-39 48 CE 10 B&P 59 34-35 30-31 44 GE l

60 34-35 38-39 08 NSF 61 38-35 34-31 14 GE l

62 38-35 42-39 06 R$P 63 42-35 38-31 14 GE 64 46-35 42-31 08 GE 65 02-31 06-27 08

'OE 66 02-31 02-27 48 Ta0 67 06-31 10-35 10 BSP 68 10-31 14-27 48'

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69 10-31 06-27 06 NSF 4'

70 14-31 18-27 14 CE ' ~

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71 14e31 10-35 08 EEF l

72 18-31 22-27 44 GE 73 18-31 14-27 10 MSP i

74 N

22-31 26-27 48 GE 75 27-31 18-35 08 NEF i

76 26-31 30-27 48 GE 77 26-31 22-35 12 BSP 78 30-31 26-27 48 m

79 30-31 34-35 08 BEF 80 34-31 30-27 44 m

j 81 34-31 38-35 10 NSP i

42 38-31 34-27 14 GE j

83 38-31 42-35 08 NSF g

84 42-31 38-27 48 GE 85 42-31 46-27' 06 use 86 46-31 42-35 10 R$P i

87 50-31 46-27 08 GE 88 50-31 50-27 48 Tao

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89 02-27 06-23 08 CE 90 06-27 10-23 10 BSF 4

91 10-27 14-23 44 GE 92 10-27 06-23 06 NSP 4

93 14-27 18-23 14 GE 94 18-27 22-23 48 at i

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Tosk Rod Folly Adjacmat Red No, witindrawn totatico _Fosition

_ Ocumsets 95 18-27 14-31 06 NSF 96 22-27 26-23 48 m

97 22-27 26-31 16 38P 98 26-27 30-23 48 CE 2

99 26-27 22-31 12 ESF i

100 30-27 26-23 48 m

j 101 30-27 34-23 12 NSP 1

102 34-27 30-23 48 5

i 103 34-27L 38-23 08 ESF 104 34-27 38-31 08 M8P 105 3& 27 34-23 14 GE j

106 42-27 38-23 48 CE 107 42-27 46-31 06 EEF 106 46-27 42-23 10 MSP-4 109 50-27 46-23 08 CE 110 02-23 W 27 08 CE 4

111 02-23 02-27 48 tuo 112 06-23 10-27 16 NSF 113 06-13 10-19 10 BSP 114 10-23 14-27 48 CE 115 10-23 06-27 06 MSP 116 14-23 18-27 14 GE 117 14-23 10-19 08 BEF 118 18-23.

22-27 48 m

i 119 18-23 14-27 10 NSF 120 22-23 26-27 48 GE 121 22-23 18-19 08 NSF 122 26-23 30-27 48 GK 123 26-23 30-19 12 MSP 124 30-23 26-27 48 CE 125 30-23 5 19 08 WSF 126 34-23 30-27 43 CE i

127 34-23 38-19 ic asF 128 38-23 34-27 14 GE 129 38-23 42-19 08 NSP 4

l 130 42-23 38-27 48 CE 131 42-23 46-27 06 NSP l

132 46-23 42-19 10 NSF l

133 50-23 46-27 08 CE 134 50-23 50-27 48 TRO l

135 06-19 10-23 08 GE 136 06-19 06-15 48 Tao 137 10-19 14-23 14 CE i

138 10-19 14-15 12 NSP J

139 14-19 18-23 14 CE i

140 14-19 10-13 06 nsF 141 18-19 22-23 48 CE 142 18-19 14-13 08 NSP 143 22-19 26-23 48 CE 144 22-19 18-13 to usF l

145 26-19 30-23 48 GE l

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Pod Pully Ad,jacent Rod No.

Withdrawn location Position _

Commwnts 1A6 26-19 22-15 08 REP 147 30-19 26-23 48 CE 148 30-19 34-15 10 BSP 149 34-19 30-23 48 GE 150 34-19 38-15 08 NSP 151 38-19 34-23 14 CE 152 38-19 42-15 06 REP 153 42-19 38-23 14 GE 154 42-19 38-1S 12 NSP 155 46-19 42-23 08 CE 156 46-19 46-15 48 TRO 157 06-15 10-19 08 GE 158 10-15 14-19 14 CE/NSP 159 14-15 18-19 14 CE 160 18-15 22-19 14 GE 161 18-15 14-11 06 RSP 162 22-15 26-19 14 GE 163 22-15 18-11 08 NSP 164 26-15 30-19 14 GE 165 30-15 26-19 14 GE 166 3 0-15 34-11 08 RSP 167 34-15 30-19 14 CE 168 34-15 38-11 06 NSP 169 38-15 34-19 14 GE 170 38-15 42-19 08 MSP 171 42-15 38-19 14 GE/SNP 172 46-15 42-19 08 GE 173 10-11 14-15 48 1R0 174 14-11 18-15 14 GE/ ESP 175 18-11 22-15 14 GE 176 22-11 26-1S 48 GE 177 22-11 26-07 06 NSP 178 26-11 30-15 48 GE 179 26-11 30-07 06 NSP l

180 30-11 26-15 48 CE l

181 30-11 26-07 06 NSP l

182 34-11 30-15 14 CE 183 34-11 38-15 08 NSP 184 38-11 34-15 14 GE 185 42-11 38-1S 48 2RO 166 14-07 18-11 08 GB 187 14-07 18-07 48 TRO 188 18-07 22-11 08 CE i

189 22-07 15-11 10 N3P 190 26-07 22-11 10 NSP 191 30-07 34-11 10 SSP l

192 34-07 30-11 08 GE 193 34-07 38-07 l.8 TRO l

194 38-07 34-11 08 CE i

195 22-03 26-07 08 GE 196 22-03 26-03 48 TRO l

197 26-03 30-07 08 GE 198 26-03 30-03 48 TRO 199 30-03 26-07 08 GE l

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AEC DI' 7EUTION FOR PART 50 DOCKET MAT !AL (TDtPORARY FOPM)

CONTROL NO:

_ '062 FILE:

FROM:

DATE OF DOC DATE REC'D LTR MEMO RPT OTIER Northarn cretam Pn"ar Comneny Minnanpolie, Minn

$$491 l

j. J. Nnchter A-6-73 A-7-73 FACcIMILE TO:

ORIG CC OTIER SENT AEC PDR v

SENT LOCAL PDR v ur. Criar 1

CLASS UNCLASS PROP IhTO INPUT NO CIS REC'D DOCKET NO:

Xxx 1

50-263 DESCRII' TION :

ENCLOSURES:

1. t r t e 7-26-73 1 tr fm B H Grier to L J Wachter.

furnishing info re shutanen margin verification t e s t s on all con t rol rod s........ W/ At tache d -

ACKNOWLEDGE 6 Results of Monticello Shutdown Marg!n Verificar ton Test, dta Augm t 3-5, 1973.........

'D0 NOT REMOVE PLANT NAME : Mon t i c el l o FOR__ ACTICN/INFOPRATION m.c.71 eo BUTLER (L)

SCIMENCER(L) y ZImANN(L)

REGAN(E)

W/ Copies W/ Copies W/ 7 Copies W/ Copies CLARK (L)

STOLZ(L)

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W/' Copies V/ Copies W/ Copies W/ Copies GOLLER(L)

VASSALLO(L)

KNICHION(E)

W/ Copies W/ Copies W/ Copies W/ Copies KNIEL(L)

SCHD1EL(L)

YOUNGBLOOD(E)

W/ Copies W/ Copics W/ Copics W/ Copies INTERNAL DISTRIBUTION IPFC V" 9 TECH REVIEW DENTON LIC ASST

_A / T IND WAEC PDR HENDRIE GRIMES BROWN (E)

BRAIIMAN

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SALTZMAN

/ MUNTZING/ STAFF MACCARY KASTlER GEARIN (L) g CASE Di1GHT BALLARD COULBOURNE (L)

PLANS CIAMBUSSO PAWLICKI SPANGLER LEE (L)

MCDONALD BOYD SHA0 MAIGRET (L)

DUBE MOORE (L)(BWR) y STELLO ENVIRO SERVICE (L)

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HOUSTON MULLER SIIEPPARD (E)

INTO y SKOV110LT (L)

NOVAK DICKER SMITil (L)

C. MILES P. COLLINS ROSS DiIGHTON TEETS (L)

IPPOLITO YOUNGBLOOD WADE (E)

REG OPR y TEDESCO REGAN WILLIAMS (E) y1'ILE 6 REGION (3)

LONG PROJECT LDR WILSON (L)

MORRIS IAINAS v4TEELE BENAROYA HARLESS VOLINER A

EXTERNAL DISTRIBUTION fA g 1 - LOCAL PDR Minnen%n1(=, Minn.

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