ML19347B149
| ML19347B149 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 08/29/1980 |
| From: | Heider L VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-16, WVY-80-121, NUDOCS 8010010677 | |
| Download: ML19347B149 (2) | |
Text
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VERMONT Y AN KEE NUCLEAR POWER CORPOR ATION SEVENTY sEVEN GROVE STREET B.4.1.1 RUTLAND, VERMONT 05701 WY 80-121 ft E PLY TO s ENGINEERING OFFICE TURNPIKE FeO AD August 29, 1980 wEsrsoRo. u AssAcHusErrs oissi TELEPHONE 6 t ?*366-90 9 9 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention:
Mr. Boyce H. Grier, Director
References:
(a) License No. DPR-28 (Docket No. 50-271)
(b) USNRC Letter to VYNPC dated June 27, 1980; IE Bulletin 80-16
Subject:
Response to IE Bulletin 80-16
Dear Sir:
This letter is in response to Reference (b) above, concerning the potential misapplication of Rosemount Inc. Model 1151 and 1152 pressure transmitters with either "A" or "D" output codes.
Subsequent to our July 25, 1980 letter, we have determined that we will be installing Rosemount Model 1152D transmitters on a temporary basis.
Rosemount has informed us that they will not be able to provide us with our preferred model 1153 transmitters until June 1981. For this particular application, the model 1153 transmitters are preferred because they meet the NUREG 0578 requirements for this application.
In order for us to meet the January 1,1981 deadline for installation of short-term Ut1 items, we will use model 1152D transmitters until we receive the model 1153 units.
The model 1152D transmitters can produce an erroneous signal when-ever they are overstressed to 140% of their manufactured range.
Our two applications of these transmitters are for the measurement of torus water level and containment pressure. The torus is approximately twenty-eight feet in diameter and the instrument taps on the torus are located vertically seventeen and a half feet apart. The water level measurement transmitters will function properly with an applied differential of eighty-seven feet of water. The application of the containment pressure transmitter meets the NUREG-0578 criterion of measuring four times the containment design pressure. The unit will function properly with a pressure equal to seven times containment design pressure.
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i Unit.ed States Nuclear Regulatory Commission August 29, 1980 Attention: Mr. Boyce H. Grier, Director Page Two Therefore, we conclude that in our application the Rosemount model 1152D transmitters will not be subjected to the ove.- range conditions described in Reference (b).
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION Y
L. H. Heider Vice President