ML20141K395
Text
, _ _ _ _. _... _. _. _....
_ _ _ _ _ _.. _. _. _ _ _ _. _ _ _ _ _ _ ~
f -
(
t
% 4, teu
- 5 q, 31e, r.g*
M To
- 1. F. Fraley, Remeutin Betratary, Acts
/s/ (f
'G-Barold Etheringto&c*ts Member From n, A subjeeti OffTEg CREEK i
l A few more thoughts on the Oyster Creek vessel.
1.
Distorties Maesurements. Measurement of the variaties of thia 61e 1.3.
and stub tube 0.D. as a functies of length aan be used to seafirm the proposed stress analysis. We 1.D. measurement should be easily made but the 0.9.
measurement any be more diffievit-the/' values show that the asial unve.
Iemath of the radial displacement is about'3 in., so measuremmate close to the weld should be made et frequent intervals. Out of-rowed measurements should also be made.
I anpoet the applicant is making euch measurements en representative tubes, but it is important to somfirm that this will be done while the opportunity still estats.
1.
Other stressu. My previous memorand.es (Deeember 20) dioevosed esial btag atreae because this atrese appeara ta be nost affocted by shange la longth e! atub tube. Bendtag shear atrese ese alse sneettened insidentally, and will he developed by the same analysis. Other stresus abould mise be investigated.
l
-(a)
In my e Arcle calculated esemple, the hoop atresa (aot 31 wen) is actually greater than the bending stress. Ecoevar, this will probably i
mot be true in the sht,rt stub tubes with which we appear to be partieu-l larly senaarmed.
(
{
(b) The sayummetry of stub tube length in the ester ettste should l
saun as set-of-round sendities near the weld, and this seeld predese a large circumferential bending stress.
3.
Cerrections to My Memo of Decesber to.1967 (a) There should be af (beta) La freet of all the I's la ths
- M abeeld sise be/f (to distisemish free "B" in the equation en p.3).
(4g f ogmation en p.3.
The "B" in the tabulaties and forenslas sa p.1 h
omet > AC RS,,,,,,,,,,.
b
@i,p,,
summt >
DAtt >.1 + 68...
..:.m us _-
-=="
3%rm A2:0 816 (R.., b 43)
U.s oownurwiramms svus ash tH s3 9203190106 910007 PDR FOIA p M / " i-DEKOK91-282 PDR
. ~
___--______..,_.__-___,__,___.._,_._,__.__m
l
(
(
I s
(b) en pese 3, item 6, the last weed should be "slesses" instead of " shields".
(e) It was not intended to imply Nt the present Satterne hP[J[;-
emeld here escurred without serrestos - they alanet sertainly esm14 met. There are really N oe goeottene
,y g
(t) if strees oorrosion eseurred eeder seedittene of g '. s.
sembined essessive stress and Layrepar envireement, are we setag to be souplacent about the emeessive strees tf the envireamentet seedition is serrestadt and (ii) ubet will be N rense of sysits thermal stresses in the outer sirste where the thermal sleeve is almost omt l
azi6 tent en one sidet I
(iii) is the destga satisfactory for Dyster creek and for future reactors.
i eeeae I
l k
t t
l t
l l
-f-( l i
omer >
l sun =aut >
I om >
. = = =
.=-.
Ftir 41 AEC 818 (Hev. &83) ut enammmaswiu te aisu l
l i
- -..