ML20244D984
Text
p, o:
' j
.4, UNITED STATES W
N
.k ATOMIC ENERGY COMMISSION i
WASHINGTON. D.C.
20545 February 19, 1969 p
sc No. 10- 0 C
{;
i 7
- e pr.
A m
M.ag. 73 Mohawk Pow $r Corporation IM
.J0 <cie Boulevard West d
gracuse, New York 13202 jbq O
Vice President & Executive Engr.
p/
tj g
- tention:
Mr. Minot H. Pratt g
ant...cr. :
"2 have followed the progress of your program for pre-service inspec-
. ton of the various Nine Mile Point reactor pressure vessel internals.
1su ts of your program, as reported to us, demonstrate that 2 one of te sensitized stainless steel reactor pressure vessel componc....
tou my indication of intergranular attack. However, certain field
.21d that join the control rod drive housings to the stub tubes were
'four to be defective. We understand that these field welds have been
. ape.ed and inspected fol.owing the hydrostatic test of the primary This matter was discussed in our letter of January 6,1965. j
{
.syst The ;sults of these tests s'aould be submitted for our review.
Easc" on ;;.e ?reliminary results of our rsvlew, we believe O.at a surv ilance,,rogram will be necessary for tue Nine Mile Point pres-sure cessa sensitized stainless steel material.
It is our opinion that uch a program would provide assurance against the effects of
'.armfai corrosion of the furnace sensitized stainless steel.
This
..iattur was discussed at a meetin; held on January 23, 1969, with
- repr uan:c. 2/es of your company and the General Electric "ompany.
Ve n.
te know your plans for implementing a surveillance program, as we 1 as the technical details of the program.
This information shoulc be submieted for our review.
We are willing to discuss any of the foregoing with you if you so desire.
~
Sincerely yours, f
r' A
Yh (,,
N%
Peter A. Morris, Director Division of Reactor Licensing ph I
cc: Arvin E. Upton, Esquire
-LeBoeuf, Lamb, Leiby & Mac?.ae
. rrh j
p i T y qm, e d,D
.~.} * %
Jt]
l 3
N;;
- i; Y O
1 U d d U f j9 $ h [,0,)
l j
\\\\
liM U 1
8104240236 890413;-
1 OU L FD LA _
e