ML20211H299
| ML20211H299 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 10/28/1986 |
| From: | Salvesen R Public Service Enterprise Group |
| To: | NRC OFFICE OF ADMINISTRATION (ADM) |
| References | |
| NUDOCS 8611050069 | |
| Download: ML20211H299 (2) | |
Text
O,., P S E G m
Public Service Electric and Gas Company P.O. Box L Hancocks Bridge, New Jersey 08038 Hope Creek Operations October 28, 1986 U. S. Nuclear Regulatory Comci'ssion Document Control Desk Washington, DC 20555
Dear Sir:
HOPE CREEK GENERATING STATION DOCKET NO. 50-354 UNIT NO. 1 CLARIFICATION OF FOUR-HOUR NON EMERGENCY-EVENT REPORT OF 10/01/86 On October l',
- 1986, the'HCGS Senior Nuclear Shift. Supervisor contacted the NRC~ Operations Center to report a
potential' significant event. pursuant to 10CFR50.72 (b) (2) (iii).
The event
. precipitating the notification was the identification of forty eight (48)
Rosemount transmitters which had suspect-environmental qualification based on the gap measurements between~the body and cover.
After' a review of the event, PSE&G has' concluded that the as-found housing cover to housing seal configuration did not pose an. operability problem-and thus is not reportable under the requirements of 10CFR50.72 and 73.
This conclusion is based on the following:
o All transmitter covers were snug and the housing seal "O"-
ring was in place.
o The environmental qualification test conditions to which transmitters were subjected to are much more severe than the conditions the transmitters will experience under a. worst case DBE.
The intended purpose of the O' Ring and 200 inch-pound torque applied to the housing cover is to preclude moisture entrance.at the terminal-and electrical connections of -the transmitters.
The DBE conditions to which this transmitter configuration was tested were:
Temperature:
318 degrees F (max)
Pressure:
73 psig Relative Humidity:
100% steam Radiation:
2.44 x 107 rads gamma Spray:
Water spray (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) 8611050069 861028
[p PDR ADOCK 05000354 S
PDR I i The Energy People i
E2173 0 t w 12 85
' To U. S. NRC l10/28/96-q.
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All safety related Rosemount transmitters included' in 'the harsh environmental qualification-program which must be operable. during the. 100 day post-DBE. period are located outside-the drywell in the Reactor Building.
None of.the transmitters -are' located.in an area subject to a high energy line break (HELB) where operability during or after the HELB' is required.
The worst case conditions to which -the transmitters will be subjected to and remain operable are:
l Temperature 148 degrees F (max)
Pressure:._
atmospheric-Relative. Humidity:
less than 100%-(< 60% during DBE perBLPg8512)
Radiation:
6.1 x 19 rads gamma Spray:
none t
o Given the above worst case conditions it is not probable that failure of any transmitter would. occur due to moisture intrusion at -the housing cover to housing seal interface.
This-conclusion.is supported by testing conducted by Wyle Labs for another utility where a' Rosemount -Series ll53B transmitter was tested to HELB conditions.without "O"
Rings and less-than snug tight covers.
The transmitter circuits were monitored for accuracy and leakage currents during the-
. ith the effects being essentially undetectable.
This HELB w
}
report is filed in our back-up equipment qualification file.
Therefore, since the as-found configuration-would not have affected the operability of any system or prevented the safety
)
function of any of the subject transmitters during normal or
-accident environmental conditions, the incident _ does not
-represent an event reportable under 10CFR59.72 (b) (2) (iii) or 10CFR50.73 (a) (2) (v). ' Thus a Licensee Event' Report will not be submitted for this event.
Sincerely, i
i-R.'S.
Salvesen L
General Manager:-
Hope Creek Operations PM tlb SORC Mtg.86-281.
F C. Distribution 7
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