ML20094N719
| ML20094N719 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 02/20/1992 |
| From: | Freeman M ALABAMA POWER CO. |
| To: | |
| References | |
| CIVP-S-060, CIVP-S-60, IEIN-84-47, NUDOCS 9204070049 | |
| Download: ML20094N719 (2) | |
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JOSEPH M..FARLEY NUCl. EAR PLANT 0063403
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NUCLEAR GENERATION DEPARINENT MEMORANDUM i Xhl.IL b USNhC F.sy 27 198692 N O S'.3 JECT:
IE Infomation Notice (IEN)
DATE:
84-47:
Environmental
[ g gCa[ W Y Qualification Tests of Electrical hXcq,gNGkMia'lCI Terminal Blocks y
FNP-86-0305 CL g
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FROM:-
M. D. Freeman 70:
File IE Information Notice (IEN) 84-47 refers to the results of a recent NRC-sponsored environmental qualification methodology research test conducted on electrical tensin+1 blocks.
It highlights a potentisl concern that any exist when terminal blocks are exposed to a The results of the test show that a moisture film steam environment.
will for= on the surface of the terminal' block during the simulation of the loss Of Coolant Accident / Main Steam Line Bresh (LOCA/MSLB) si=ulations and that the leakage currents may be of significance in sc:e applications.
In view of the above, licensees are suggested to (1) review their facilities to deter =ine if the specific terminal blocks are used in
'or voltage applications. and (2) review terminal block qualiff cation to ensure that the functional requirements and associated loop cocument accuracy of circuits utilizing tenninal blocks will not degrade-to an.
unacceptable level due to the flow'of leakage currents that might occur dur:ng design basis events.
TNP us es States Terminal Blocks in safety-rtlated applications-A c m.1c e test report and re utring Environ = ental Qualification.
,;usuficction for environmental qualification of these terminal blocks is centained in the Environmental Qualiff catfwa-Manufacturers file.
Index.
TN? qualification of these tenait.sl.h acks addresses leakage It also includes consideration for accelersted aging and currents.
seis:ic testing as well as thCA and caustic spray testing. 'Therefore.
j ecnfidence in' the reliability of its terminal blocks.
TNP hat.
Baseo or the above information, no.further action is required with regard to this notice.
Approximately two man-hours were expended in the research and preparation of this response.
Prepared By '.Y %
WCa J Reviewed By C. d. k d Approved By Staff Exh. 60 tj 9a04070049 920220 PDR ADOCK 0500034g O
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