ML19332A266
| ML19332A266 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Arkansas Nuclear, North Anna, Farley  |
| Issue date: | 09/09/1980 |
| From: | Kapo P Office of Nuclear Reactor Regulation |
| To: | Collins M, Scott S NRC OFFICE OF ADMINISTRATION (ADM) |
| Shared Package | |
| ML19332A267 | List: |
| References | |
| NUDOCS 8009110371 | |
| Download: ML19332A266 (1) | |
Text
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THE UNIVERSITY OF TENNESSEE KNOXVILLL TENNESSEE 37916 DEraminatief or huCLt.Ae ENGsNaEntNG
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I fir. Peter Kapo US(RC Office of iluclear Reactor Regulation Div. of Operating Reactors P.eactor Safety Branch Washington, DC 20555
Dear Peter:
This is to inform you of our experience to date on response time
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testing in nuclear power plants. The plants and dates were-i
!illistone 2: August 1977, December 1978, liay 1979 (one sensor)
Farley 1: October 1978, January 1980 y
florth Anna 1: August 1979
[
t' A'l3 unit 2:
flovember 1978, Decem.ber 1978 il The only plant other than tiillstone in which tests were performed at an interval. suitable for detecting degradation due to ageing was Farley.
At Farley, 'the same two Rosemount 176 KF sensors were tested fifteen months apart. The results were l
1
,I Time Constant Self Heating Index Sensor October 1978 January 1980 October 1978 January 1980 1
.10 sec
.11 sec
- 7. 5 n/W 7.4 n/W 2
.12 sec
.12 sec 5.8 n/W
- 5. 7 n/W These results show that the changes were negligible for these sensors.
I have also enclosed another copy of the information on conser-vatism in the results.
Please yet me know tr y** have further questions.
DUPLICATE DOCUMENT Entire document previously ng entered into system under:
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