ML20148F781
| ML20148F781 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/10/1976 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| Shared Package | |
| ML20148F784 | List: |
| References | |
| NUDOCS 8011060731 | |
| Download: ML20148F781 (3) | |
Text
_.. - _ _ _ _.. _ _ _
..g -
x g
g 4
t SEP 101976
-T Docket No. 50-29 l
?
Yankee Atomic' Electric Company i
ATTNr Mr. Robert H. Groce Licensing Engineer m
- Westboro20 Turnpike 1 Road C
'.s f
. Z 32. E
.. Massachusetts t 01581 N'c h MM $[.%
s t
l%umMy Q h
jy
{.,.
[V+
~
~ \\[
g.yv, ~,4,%
,v 3., % +:.; M p.
}'
'RE:] YANKEE-ROWE g g - ] M Ny y y;3 sg +M?%, ^, _ J c_,
Q m,
g
~'l General Desips.Crite'ria (60C)l. n(A x
'w
.. :... m n,, 4 2 -
l c
~
t 30 and 32 of Appendix A to 10 CFR Part 50 require ;theticomponents that are part of the reactor coolar.t pressure boundary receive periodic inspection and testing of c,ritical areas to
- assess:their structural;and leaktight:integetty. LThe steam generator f
tubes constitete'ever 50% of, the area :of the total ~ primary system
. pressure-retaining boundary in pressu~rized-water reactors. Our letter dated ~
' July 18,1974;' requested you to propose suitable' technical specifications for the serve 111ance of the' steam' generator tubes consistent with the
., requirements of the GDC and. Regulatory Guide 1.83 titled " Inservice In-1 fspection of Pressurized Water Reactor Stean Generator Tubes." Since your
' proposal was submitted,'R.G.1.83 has1been revised; therefore, we request that you revise your submittal to.be consistent with the enclosed model t
technical specf fications.which are based on Revision.1 'of R.G.1.83, dated July 19756. ~ N ; >'
' < ' 5.v.a E w;
.~...,
. d R.G.;).83; refer.to;aitube plugg.
s
.4.... :a
. +
n
,,n...-
~
Both' the Loriginal ande ing limit rer)se and plugging criteria.ibut neitherlprovides guidance on how'these are to i be quantifled.? LThe, plugging, limit in)theLenclosed ~model technical specifi-f~
Lcations is based,an the minimum tube wellithickness'needed to maintain 4
tube integrity duringfa;LOCA combined.with a safe shutdown earthquake and
'an operational' allowance to account forJ time intervals between inspections.
i We have concluded that plugging limits.that are based on these considerations '
. : satisfy the requirements of the GDC and. are acceptable.to us.
j g.ggg.g.gy y, g,7 g (p, r,7 q.y
-- 7
.~.
%. fore,'3enerator tubedeakageLcan,b' s Steam e an indication ofitube degradation; there-
~
s
- operation should be included (leakage limit and'allimiting condition for :
we, have" concluded that a i
[
the technical-specif1 cations;to ensure timely *
. action lin therevent of steam generator. tube, degradation. A leakage limit
.f ito us.y~M.one in thelenclosed modell: technical: specifications'is a i
- such as the
(
m$eMMW @n.~QM s
- 2 4.h
" v t, Q+ y@ g w g phw p g FT91S7000UMENECONTAINSI ~I.
w r.
4pg Q N g*' W n
^ '
i-
+s MPO RlUAOTifPAdESh' l.
?
J,;
/
[
I oprics >
_' f f;,,,,,,L,_,,,,
'jf g.. *
? ^ p'c '
'L.:
suasaama e l
s.e Dart h A
Focus ABC.318 (bet. 9 53) ABCM 0240
- u. o. sovanansaur enistime orricas een.as i.e L ---
- o..oe- ; <w.s,
-u~---..a~'
w..
p.km t
4 f
+
ie w
'ankee Atomic Electric Company 2-SEP 101976 Y
l t
Certain steam generators have completed the first cycle of operation l
1 with tube inspection results that have indicated little discern-ible degradation. - These early-in-life inspection results may not be indicative of the total 40 year design life of steam generator tubes in terms of tube integrity. Therefore, we have concluded.that sur-l veillance of steam generator. tube integrity should be covered by technical t
specifications for all facilities including those where early inspection cycles have not indicated any discernible or increasing degradation.
I e The enclosed model technical specifications gives credit for favorable i
early.: inspection _results by; extending subsequent. inspection intervals
~
keeping at a minimus
. g"and,YLf je X q.%,the; number sf, tubes tolbe probed. < W" ~ -
q>
f i
y
,4 W M N '.
g Je request that within 45.~ days;~ ef receipt'of this ' letter / you revise or i
- resubeit your request for a'licen;se' amendment using the enclosed model i
l
, technica1Lspecifications.for guidance. The model. technical. specifications i
. Lshould be' appropriately; adapted :tolyour spectfic' format and to the number
.of steam, generators 14 your plant.'
': - De c '
N-l
~;b i m W G. M +Yh;;3. 7.,5, %r% N ' a:V,*L l
r o
gg,: 3.gg.. M Sincerely, o.~. -S
'e c y ;. p - g.,
4
,, t w l '
js.(. f.. ~;*$.)7. }1.i y 4. 1
?,..
m
). W.
' c o. :
r t.
..u c
., r p:e 'r r
v
> m> ~ ; -
,i
." u yw-(,
15..
.,.i+..@
- 4
+
',J q Q j,a.
e
., % < / --. 4 s r
j d r.i3 a^
4.j * [,3 g "e
'a-i}L
.'r
'e * ~
- i
.g
'('
5
~.
- p. ;.-[x., rn,q
- y' l.z n y
- rd
{
- Ja,.c j
3,,
c 9-y-
7 n 5
,,,7
. yg : er
- "8 4
.f.
A,' ;Schwencer, Chief '
,;(
. $ ff y ;-
g,.
~,
s i
q~ Operating Reactors Branch 91 f' '
~
.s.
-o Division of Operating Reactors o,
T 4
e 4,
~
.? / Enclosures M,. ". d.n.'y Q., Xc'
' Model ' Technical. Spect fica tions,
s v
"4 y
l3%
f :se% w. n.W e sent page?J W.i ; S :',1,;,N M c ~
Mm cc Wenclosure:
3.%gygggQ
.4,
i
. A WWWW w} '~C?v % &y; ; & f %, Q L.
])y ' ; 9 :;.3 %
Ji
.,.,,M s "llDISTRIBUITON-Q' N VStellos p 0!&E-(3) W ylN N Q &-@ 4.; E 3
Docket File M W DEisenhu.t E C
&T N RI
"'l
.NRC'PDR
- 'N P W s#
Local PDR
@ l % MFairti1Ac, M N AI D % [ XFd/
~
-KRGoller
] u.h ABurgert j @% g#@ @: p [$p $m p g [ M w
- pASchwencerQSi ryg@gQQPMMgygy'y Q
'TJCarter.
)
<g a
o
+
f MD$MNQMMd f ~
i*
- b M SMSheppard R$W4$W*f.ki;?%&fwnMMd:W% %
~b 4 TBAbernathy l N D M jh FMN f
MfCJRBuchanan'MM$MfM@@M@MM@W%%
s W ACRS'(16)MMMi'h O,W@pl@IN@
M.fMMy$sMMW f
?
's LBR&5MW 2 M M W M. y Q.
... y;'n.
wk
.M N
.+.. a q s aMWW8.. y. WW.
h~-
'?
$,DELD n-N q%
%gQ$(p.. u
- a%e% p.pp b. p+%.w@e@w5$ QM Q M 3gf
(
4
$c yl" 4 L, 5 e.g.
w' m
.0 Mr 4,,
n 9 v :,:
r
- <.
- M.
3-t 1
. ;...~ DO..R. : 0RB O..
..D....O...R... :. Q.R.. B.(7.. 00F Bf]__
in i
Rai tile.N..,ASC r.
D S= 4 ' ABurger:] y t
o. ncet._
h...
-9/..1. 0../.. 7..
..9. @/..7.6.. -.
9.gH.6.. 5.....
_ l o,,,.
Forms AEC.318 (Rev. 9 53) AECM 0240
. # u. e..owsnmasum? rnemvine orricas te74.sae. tee 6a-
.:r;;fJi
.s.
m.-..._.
-,-. _..... ~...
s Yankee Atomic Electric Company September 10, 1976 cc: Mr. Donald G. Allen, President Yankee Atomic Electric Company 20 Turnpike Road Westboro, Massachusetts 01581 Greenfield Public Library 402 Main Street Greenfield, Massachusetts 01581 i
i
?
[
i I
I t
i i
l I
i
- - +
-,