ML19309G428
| ML19309G428 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/01/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Rubenstein L Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8005060279 | |
| Download: ML19309G428 (1) | |
Text
TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 400 Chestnut Street Tower II May 1, 1980 Director of Nuclear Reactor Regulation Attention:
Mr. L. S. Rubenstein, Acting Chief Light Water Reactors Branch No. 4 U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Rubenstein:
In the Matter of the Application of
)
Docket Nos. 50-327 Tennessee Valley Authority
)
50-328 Sequoyah Nuclear Plant technical specification 9.1.4.a requires that:
either TVA demonstrates that the reactor coolant flow transmitters supplied by Foxboro be qualified for the radiation environment associated with normal operation for plant life; or, alternatively, a schedule for replacement of these transmitters at intervals acceptable to the NRC staff and consistent with the qualified life of the transmitters be supplied.
In response to the requirement, TVA is supplying the following information.
Foxboro E12DH transmitters and amplifiers are used at the Sequoyah Nuclear Plant as reactor coolant flow transmitters. AsstatedinJoxborotest report T2-1075, these transmitters are qualified to 1 x 10 RAD over the life of the plant. Therefore, thequalifiedlifeofthetransmitters would yield an integrated dose of 2 x 10 RAD over the life of the plant.
Therefore, the qualified life of the transmitter is 20, ears. TVA will ensure that no transmitter will see a service life of more than 20 years.
Very truly yours, TENNESSEE VALLEY AUTHORITY a /.
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L. M. Mills, M' nager a
Nucleat Regulation and Safety Aco!
5
/!o An Equal Opportunity Employer