ML17037C185
| ML17037C185 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/30/1975 |
| From: | Rhode G Niagara Mohawk Power Corp |
| To: | Lear G Office of Nuclear Reactor Regulation |
| References | |
| Download: ML17037C185 (4) | |
Text
NRC DISTRIBUTION FOR PART 50 DOCKET MATERIAL (TEMPORARY FORM)
CONTROL NO:
127X0 FI)E:
~
~
Mr Geor.
e Lear FROM Niagara Mohawk Power Corp
- Syracuse, N.Y; era ld hodr' TO 0 ORIG
'1-si ned 11 5 CC OTHER DATE OF DOC DATE REC'D LTR TWX RPT SENTNRC PDR SENT LOCALPDR OTHER CLASS
. UNCLASS XXX PROP INFO INPUT NO CYS REC'D
'DOCKET NO:
50-220 DESCRIPTION:
~... Ltr'. xe our 9-10-75. ltd furn. a'dd 1 -in'f'o regarding '.restraints
"-on relief valve di,schar lines inside the torus at Nine'Point Unit'.
~ ~ ~ ~ '
~
0 ENCLOSURES:
~ '
PLANTNAMg-FOR ACTION/IN FQ RMATION BUTLER (L)
W/ Copies CLARK (L)
W/ Copies PAR/ (L)
, W/ Copies
'NIEL (L)
~ W/ Copies SCHWENCER (L)
~
W/ Copies STOLZ (L)
W/ Copies VASSALLO (L)
W/ Copies PURPLE (L)
W/ Copies RZID(L)
W/
COPIES 11-7-75 JGQ INTERNALDISTRIBUTION ZIEMANN(L)
BEGAN (E)
W/ Copies W/ Copies DICKER (E)
~EAR (L)
W/ Copies WP'opies KNIGHTON (E)
SPWS
'/
Copies W/ Copies YOUNGBLOQD.(E)
LPM W/ Copies W/
opuses RC PDR GC, ROOM P-506A GOSSI CK/STAF F CASE GlAMBUSSO BOYD "I'I- MOORE (L)
DEYOUNG (L)
SKOVHOLT (L)
-.;. GOLLER (L) (Ltr)
P. COLLINS DENISE
~
~ ~EG OPR FILE 5 REGION (2)
I 1%1 ~
- tc MIPC
'l TECH REVIEW SCHROEDER MACCARY KNIGHT PAWLICKI SHAO STE LLO HOUSTON -'
NOVAK ROSS IPPOLITO TEDESCO J a COLLINS LAINAS BENAROYA'OL'LMER' DENTON LIC ASST G R IMES R. DIGGS (L)
CiAMMILL H. GEAR IN (L)
KASTNER E. GQULBOURNE (L)
BALLARD P, KREUTZER (E)
SPANGLER J.'EE (L)
M. RVSHBROOK(L)
ENVIRO
'S; REED (E)
MULLER M. SERVICE (L)
DICKER S. SHEPPARD (L)
KNIGHTON M.'SLATER (E)
YOUNGBLOOD H
MITH (L)
RE AN
. TEETS (L)
OJECT LDR G. WILLIAMS(E)
V. WILSON(L)
H RLESS R. INGRAM (L)
M. DUNCAN A/T IND
~
BRAITMAN SALTZMAN. <<
~
~
MELTZ PLANS MCDONALD CHAPMPgi ~ >>
DUBE (Ltr}
E. COUPE PETERSON HARTF I E LD'2)
KLECKER E ISF-NH.UT, WIGG I/TOP llbn~w ga
~ '" .':":.""'".'"EXTERNALDISTRIBUTIO ""':""~""..'.'"r: ':- "~.'.
~ -'"'.'
LOCALPDR~s~~o N.Y.
~ TIC (ABERNATHY)
(1)(2)(10) NATIONALLABS
~ NSIC (BUCHANAN)
W. PENNINGTON, Rm E-201 GT 1 ASLB 1
CONSULTANTS 1 Newton Anderson NEWMARK/BLUMEAGBABIAN ACRS HIPtSIN4+5ENT Pc 4-i+
1 PD R-SAN/LA/NY 1 BRQOKHAVEN N'AT LAB 1 G. ULRIKSQN'ORNL
, ggjljl/
UP P8 ~
h
~
~ ~
~
~
~ ~
~ ~ ~
NIAGARA MOHAWK POWER CORPORATION NIAGARA~
MOHAWK 300 ERIE BOULEVARDWESBQQQQQ SYRACUSE, H. Y. I3202 g(e Cy.
October 30, 1975 Director of Nuclear Reactor Regulation Attn:
Mr. George Lear, Chief Branch 83 United States Nuclear Regulatory Commission Washington, D. C.
20555 Re:
Nine Mile Point Unit 1 Docket No. 50-220 eN 'f0, NDV< iS7g~
C Q/I'. (p
'ear Mr. Lear:
This letter is in response to your September 10, 1975 request for information regarding restraints on relief valve discharge lines inside the torus at Nine Mile Point Unit 1.
An analysis was performed on the supports for the relief -valve discharge lines in August, 1973.
The restraints on the ramshead discharges were also included.
A com-plete mathematical model was developed for the system.
Results of the analysis showed that all stresses in critical areas were within the allowable values of Section III of the ASME Boiler and Pressure Vessel Code.
Also, in response to your letter, an inspection of the torus and internals was made during the 1975 refueling outage which did not disclose any evidence of damage or deterioration.
A program is being undertaken, by the Mark I Owners'roup which includes an extensive investigation of relief valve discharge phenomena to assure that all restraints are adequately designed.
Very truly yours DOO erald K. R de Vice President Engineering 80yq u
i<
1S$5 ~
MICIgA eOMMice'"elATORY MogI 1>II, SeÃq~
%27%0
/
yP NI b
S 4
pl