ML19224A133
| ML19224A133 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/14/1978 |
| From: | Herbein J Metropolitan Edison Co |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| GQL-1418, NUDOCS 7809250187 | |
| Download: ML19224A133 (2) | |
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METROPOLITAN EDISON COMPANY
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,7 PCST OFFICE BOX 542 READING. PENNsYLVANI A 19603 ge,. e w. e 3h,7gt@
TELEPHONE 215 - 929-2001 A
GOI, lh18 Director of iuclear Regulatory Regulation Attn:
S. A. 7arga, Chief Light '4ater Reacters Eranch !!o. 4 t
U. S. Ziuclear Regulatcr/ Cc=ission
'4ashington, D. C.
20555
Dear Sir:
Three Mile Island :Tucler Station, Unit-2 (CE-2)
Cperating license :To. DPE-73 Decket :so. 50-320 Respense to IE Sulletin so. 78-02 Cn Janua y 30, 1979, Met-Ed provided info matica ecccerning the use of electrical tercinal biccks inside the CC-2 centain=ent. 2 13 infor=aticn was trovided in rest.ense to II Eulletin 78-02.
"'he infer =aticn pre rided in cur letter c: January 30, 1978 indicated that:
"... all safety-related circuits have been recoved frcs terminal biccks and connected using butt splices ccvered by shrink fit naterial...".
As a result of our reviev of I2 Circular 78-08, ve have ree.lized that the infer =ation included in the above qucration requires sene a:iditicnal clarification.
During the ccurse of cur review of 2 Circular 78-08, it was determined that the terminations of several safety-related circuits had not been re=cved frc their t e.-4-a ' blocks and connected in the manner described above.
2e te. inations which were overlocked are as follows:
I Penetration '"emination :
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- 7a.17e Creratcr ~'eminations : EC 7 1, 3 L k9 fiS 7 1C0
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" Lese te.~inations have recently been rencved frc= their terminal bicc%s and connected using heat shrink naterial as describe" '- - -aspense to IE Eul-letin 73-02.
- n addition, an investigation is currently unde-vay to dete =ine
- t. ether additional safet/-related circuit te minations have not been ccnnected
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reveals that any additicnal safety-related circuit te. inations are not ecn-nected in the
-a ner describe 1 in cur letter of January 3C,1973, you vill be
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S. A. 'larga, Chief septe=3er 13, 1973 GQL 1hl3 31 ease note, hevever, that the area of concern identified in II Bulletin 78-02
.nvolve the use of unpr:tected terninal biccks en safety-related circuits in-side cent ainment. In cur letter of January 30, ve indicated that for safe +y-re ated circuits inside centainment at 1MI-2, terminal biccks and butt sp' bbU as are not unprotected, but are instead protected by vented terminal boxes.
review based en :2 Circular 73-08 indicates that there
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.g!"~,101+,.,^cks or butt splices used for safety-related circuits inside the 0-a -2 ccu_ es anent.
Sincerely, J. G. Herbein Vice President-Generation f/
JGE:R/L:c'g r~ n, e