ML20090L609
| ML20090L609 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 01/06/1976 |
| From: | Mayer L NORTHERN STATES POWER CO. |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| 156, NUDOCS 9102120456 | |
| Download: ML20090L609 (2) | |
Text
n NORTHERN 5TATES POWER COMPANY M I N N E A f* O L,l t. M I N N E S OT A 55408 REGUu z
., D M- (-
4 l
January 6, 1976 j
/->
N ss
/ f (j-N1 l.i Mr Victor Stello, Director
_; o
/8g A Division of Operating Reactors
~j,7 f
U S Nuclear Regulatory Commission
-\\
y%
+
Washington, DC 20555 i,A
Dear Mr Stello:
MONTICELLO NUCLEAR CENERATING PLANT Docket No. 50-263 License No. DPR-22 Rfety/ Relief Valve Line Restraints Inside Torus In a letter to Mr D L Ziemann, dated December 16, 1975, we transmitted a report entitled, " Structural Analysis of Safety / Relief Valve Discharge Line Restraints Within Torus".
Paragraph 3.c of that report contains an error in the peak bending stress calculated for the relief valve restraint. The reported value was 27,000 psi at Restraint B.
The correct value is 35,000 psi at Restraint C.
The revised stress is still below the design yield stress for A36 material.
Yours very truly, N'
L 0 Mayer, PE Manager of Nuclear Support Services LOM/LLT/ak cc: J G Keppler 1:-.
I~
156 G Charnoff f(
~\\
MPCA 4-gg '.
. m %'
- -J Attn: J W Fernan o '
3' w s. r : r.s.
~,
'Ess",l
.]
b/
/ -}
~\\
9102120456 760106 DR ADOCK 05000263 PDR
I N i t C D l".'s HUTION FOR PART 50 DOCM ET fAs.il:RI AL
- (1 LfAPORARY I OltfA)
CONTROL NO:_/ J 4..
FILE:
FROM: Northern States INr Co DATL OF DOC DATE REC'D LTR TWX RPT OTHER Minneapolis, Mn 1-9-76 XXX iE ORIG CC OTHER SEN f!!RC PDR Yv Mr.Stello one signed SENT LOCAL PDR XX
~
CLASS UNC L ASS PRUPINFO INPUT NO CYS REC'D DOCKET NOi XXXXXX 1
50 263 DESCRIPTION:
ENCLOSURES:
Ltr re their' 12-16-75 ltr.... advising that O hT,* '. T' " ' ' l ~ 3 an error was made in that submittal which v-concerned safety /rel'te f valve line restraint, inside torus'.....& furnishing correc tions "to the mistake..........
PL ANT NAME:
Monticello FOR ACTION /INFL RMATION 1-9-76 chf RU iLER (L)
SCHWENCER (L) ZIEMANN (L)
REG AN (E)
REID(L)
W/ Cop es W/ Copics
' W/fCopies W/ Copics W/ COPIES i
CLARK (L)
STOLZ (L)
DICKER (E)
LE AR (L)
W/ Copics W/ Cepies W/ Copies W/ Copics PARR (L)
VASSALLO (L)
KNIGitTON (E)
SPE0 W/ Copies W/ Copics W/ Copics -
W/ Copics MNIEL (L)
PURPLE (L)
YOUNGU LOOD (E)
LP:t W/ Cepier, W/ Copics W/ Copies W/ Copies INTERNAL DISTRIBUTION CUU D TECH REVIEW DEN 10N LIC ASST A/T IND.
I;C PDR
~5DiiRiL DE lf" CRIMES R.ijf(iU5 (U ldiKITidAN j
yOGC, ROOM P 500A MACCARY G AMMILL H. GE ARIN (L)
SALTZMAN EGOS 9f CK/ST AF F KNICsilT K ASTNE R E GOUI.DOURNE (L)
ME LT Z j CASE PAWLICKl BALLARD P. KREUTZER (E)
SHAO SP ANG LE R J. LEE (L)
.P L AN S, ROYD STELLO M. nvy.i, noon (L)
MCDONALD MCORE (t)
HOUSTON ENVIRO S. RLED (E)
CHAPMAN DEYOUNG (L)
NOVAK MULLER
~ M. SERVICE (L)
DUBE (Ltr)
SKOVHOLT (L)
ROSS DICKER S. SHEPPARD (L)
E. COUPE GOLLER (L) (Ltr)
IPPOLITO KNIGHTON M. SLATER (E)
PETERSON P. CO L LINS TEDESCO YOUNGBLOOD H. SMITH (L)
HART FIELD (2) t DENISE J. COLLI!!S REGAN S. TEETS (L)
KLECKER
.RlTi Of fl LAINAS PROJECT LDR G. WILLI AMS (E)
EISENHUT
/ FILI & itEGION (2)
BENAROYA fj e ve V. Wil SON (L)
WlGGINTON lill C VOI.LMER H ofE ESS R. ING R ' M (L)
I II. DUlTA!! L E. PARRI[Il_(L)
EXTt.riN AL DISTRICllTION 7 - LOC Al. pD R. lUmn.tAfe b t. 5l*
1 7 - TIC (ARl'RN ATilY)
(1)(2)(10) - NATIONAL L ABS.
1 - PO R.S AN/L A/NY 1
1 -- NSIC (EllCli ANAN) 1 - W. PENNINGTON. Rin EJ01 GT 1 - BROOKHAVEN NAT LAB i
1 - ASLD 1 - CONSULTAN i S 1 - G, ULHIKSON ORNL j - Newton An.!n son N EWM AR K/t;L UM E/AG B ABI AN
'/ 6 - ACRS P/SENT
/'
'T o L.A Ot33S
/) W.?.