ML19290A481
| ML19290A481 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/14/1974 |
| From: | Arnold R METROPOLITAN EDISON CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7911070655 | |
| Download: ML19290A481 (3) | |
Text
AEC DIS
- BUTICN FOR PART 50 DOCKET MATE
L~
1361 (TEMPORARY FCRM)
CONTROL NO:
FILE:
FRCM:
DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Metrocolitan Edison Company Reading, Penn.19603
'!r R.C.
Arnold 2-14-74 2-20-74 X
TO:
'^^
SENT LOCAL PDR
^^^
A. c.innbus9o 1 signed CLASS UNCLASS PROP INFO INPUT NO CYS REC'D DOCKET NO:
- tu 1
50-289 DESCRIPTION:
ENCLOSUP2S:
Ler re our 12-3-73 ltr furnishin:: infornation
- n d
concernin; Snubbers at the Three Mile Island
~
'~~~~
- iuclear Station..
,., - ~
PLANT NAME:
Three Mile Island FOR ACTICN/I."20R'!ATION 2-20-74 E
BUTLER (L)
/ SCEiENCER(L)
ZIE4 ANN (L)
REGAN(E)
W/ Copies W/f' Copies W/ Copies W/ Copies CLARK (L)
STOLZ(L)
DICKEP,(E)
W/ Copies W/ Copies W/ Copies W/ Copies GOLLER(L)
VASSALLO(L)
KNIGHION(E)
W/ Copies W/ Copies W/ Copies W/ Copies XNIEL(L)
SCHEMEL(L)
YOUNGBLOOD(E)
W/ Copies W/ Copies W/ Copies W/ Copies INTERNAL DISTRIBUTION g
QJG_ FT T W TECli REVIEi DEiTON A/T I"D LIC ASST
- AEC PDR
'HENDRIE GRIMES BRAIDIA'I OGC, ROCM P-506A SCHROEDER GAPMILL DIGGS (L)
SAL'ITMAN MUSTZING/ STAFF
/ MACCARY KASTNER GEARIN (L)
B. HURT CASE KNIGHT BALLARD
/ GCULBCURNE (L) pt3,.3
/ GIAMBUSSO PAWLICKI SPANGLER LEE (L)
- MCDCNALD BOYD SHA0 MAIGRET (L)
DUBE *a/ Input MOORE (L)(2*iR)
STELLO ENVIRO SERVICE (L)
DEYOUNG (L) (I*,JR)
HOUSTON MULLER SHEPPARD (E)
INFO
/SKOVHOLT (L)
NOVAK DICKER SMITH (L)
C. MILES P. CCLLINS ROSS KNIGHTON TEETS (L)
- 3. KING DENISE IPPOLITO YOUNG 3LCOD WADE (E)
/ REG OPR TEDESCO REGAN WILLIAMS (E)
FILE & REGION (3)
LONG PROJECT LDR WILSON (L)
MORRIS LAINAS S.
REED (L) 1557 359 STEELE BENAROYA HARLESS VOLTl!ER b '
EXTERNAL DIS"'RIEUTION VJ
'l - LCCAL PDR Harrisburg, Pa.
V 1 - DTIE(ABER'iATHY)
(1)(2)(10)-NATIONAL LA3'S 1-PDR-SAN /LA/MY l - NSIC(CUC:LL'4AN) 1-ASL3P(E/~i Blda,Rm 329) 1-GERALD LELLCUCHE 1 - ASLB(YC'Z/SAYRE/
l '.J. P:N ;I::GTO:;, ic. E-201 GT BRC0KHA'.'EN NAT. I.AB WOODARD/"H" ST.
1-CONSULTANT' S 1-AG'!ED(Ruth Guss=an)
/16 - CYS ACRS KSXHIXE Sent to Goulbourne NE.?iAR'</ BLl":!E //.03ABI AN EM-B- 12 7, GT.
1-GERALD ULRIKSON...CRNL l-RD.. PULLER..F-:09 GT 2-20-74 7911070 6ff
..i
. a v.
/7270 m..
5=:,,
- w.xam J
METROPOLITAN EDISON COMPANY
=
r m
POST OFFICE BOX 542 RE ADING, PENNSYLV ANI A 19603 TELEPHONE 215 - 929 3601 February lb, 197L
['
.N
,!' ;)"
dh
'Q' f
c$, p-g &
Qf 6
,7 %
3, v'
~
I k',h q'1 g.
..s f
l X
k,5i, j1s (W;f ',-
x1 W
I
&. :s,-
>Y.),
s a
p
'.,s 9 ^y Q.
f= Q n fe, 7 ~'T "' ~~'
M/,
~~
v
- w ev r
I-}. A. CiaChusso
'/'
'N i, -
.~
Deputy Director for Reactc.' $%
\\
7' )
C'
(
Directorate of Licensing Y.N Cffice of Regulation
,' ~
U.S. Atomic Energy Cet ission Washingten, D.C.
205k5 Lear Mr. Gia=busso:
Subj ect :
hree Mile Island Nuclear Station Unit 1 Docket No. 50-239 Ycur letter of Oecember 3,1973, advised of pro'clems associated with Bergen-Patterson snubbers and requested we undertake a seal codificatica program en any 3ergen-Patterson snubbers installed on Three Mile Island Unit 1.
Your letter further required that in the event 3-? snubbers were found to exist en 3ree Mile Island Unit 1, a surveillance prcgram be established to guard against incervice failure of seal raterial.
In respcnse to the abcVe we have undertaken a review of the snubber installa-tion at Three Mile Island Unit 1 and can advise as follows.
~'here is a total of two hunied sixty-nine (269) snutters located on safety related systens at Three Mile Island Unit 1 (TMI-1).
?ao hundred nine (209) of these were manufactured by Grinnell, and the remaining sixt'/ (60) were manufactured by Basic Engineers.
Here are no Eergen-Fattersen snubbers installed on Sree Mile Island Unit 1.
We have been in contact with bcth Jrinnell and Basic Engineers since Cetober 1973 in efforts tc establish (1) the seal material used in the TMI-l snubbers, (2) the Operating experi-ence they have had in other nuclear pcVer plants with the installed material, and ( 3) whether the-/ felt replacement of the seal material was necessary.
1557 360 1361-
Mr.
A. Giambusso February lb, 197h Both Grinnell and Basic Engineers have assured us that all seals used in the TMI-l snubbers are made of inj ection molded polyurethane er ethylene propylene, and that they know of no seal failure with this type of material.
They have concluded, therefore, that replacement of the I.M.P.
seals is unnecessary for Grinnell and Basic Engiraers snubbers.
Met-Ed/GPUSC has rioted, however, that recent test data released in !!cvember 1973 from the P1rker Seal Co. indicates that the properties of ethylene propylene are superior to those of molded polyurethane at elevated temperatures (above approximately 20C0 F.).
It is not expected that TMI-l snubbers will ever be exposed to such temperatures.
Ecwever, in the interest of improving the sell material in TMI-1 snubbers to the best possible material consistent with the state-of-the-art, we have decided to undertake a program designed to change over all TMI-l seals to ethylene propylene. We are presently waiting for delivery of a complete set of ethylene propylene seals for all TMI-l snubbers, however, delivery is not expected before several months.
Since there are no Bergen-Pattersen snubbers installed at TMI-l and since the snubbers of the type installed at TMI-l have not experienced seal failures in operating plants, we will inspect the snubbers during each scheduled refueling outage until a complete changeover to ethylene propylene seals has been accceplished.
The TMI-l Technical Specifications (Spec. h.1 Cperational Safety Eeview Table k.1-2) will be revised to include the requirement for snubber surveillance.
Very truly yours, Gn f
)'
//3 1
~- ~-s [ " ~ -
\\ :
t-
,i l R. C. Arnold Vice President RCA:nh cc:
Messrs. J. G. Miller J. P. C'Reilly W. A. Verrechi 1557 361