ML19341B227: Difference between revisions
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| number = ML19341B227 | | number = ML19341B227 | ||
| issue date = 01/27/1981 | | issue date = 01/27/1981 | ||
| title = Submits Proposal to Install Class IE Protective Circuitry by End of Next Refueling Outage,As Required in NRC | | title = Submits Proposal to Install Class IE Protective Circuitry by End of Next Refueling Outage,As Required in NRC | ||
| author name = Heider L | | author name = Heider L | ||
| author affiliation = VERMONT YANKEE NUCLEAR POWER CORP. | | author affiliation = VERMONT YANKEE NUCLEAR POWER CORP. | ||
| Line 11: | Line 11: | ||
| contact person = | | contact person = | ||
| document report number = FVY-81-15, NUDOCS 8101300487 | | document report number = FVY-81-15, NUDOCS 8101300487 | ||
| title reference date = 09-24-1980 | |||
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC | | document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC | ||
| page count = 2 | | page count = 2 | ||
| Line 17: | Line 18: | ||
=Text= | =Text= | ||
{{#Wiki_filter:,+ | {{#Wiki_filter:,+ | ||
VERMONT Y AN N EE NUCLEAR POWJCR CORPOR ATION SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTLAND. VF.RMONT 05701 | VERMONT Y AN N EE NUCLEAR POWJCR CORPOR ATION SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTLAND. VF.RMONT 05701 FVY 81-15 REPLY TOs ENGINEERING OFFICE 1671 WORCESTER HOAD F R A kuNGH A M. M ASS ACHUS ETTs ot 7of itLEPHONt et7 872-8tOO | ||
-3 January 27, 1981 wJ 23 United States Nuclear Regulatory Commission Washington, DC 20555 n; | |||
wJ United States Nuclear Regulatory Commission | g3 M | ||
5 | |||
5 Attention: | [$ | ||
Thomas A. Ippolito, Chief Operating Reactor Branch #2 Division of Licensing Re ferences : (1) License No. DPR-28 (Docket No. 50-271) | Attention: | ||
Office of Nuclear Reactor Regulation Thomas A. | |||
Ippolito, Chief Operating Reactor Branch #2 Division of Licensing Re ferences : (1) License No. DPR-28 (Docket No. 50-271) | |||
(2) VYNPC Letter to l'ONRC dated October 11, 1978, WVY 78-92 (3) VYNPC Letter to USNRC dated July 27, 1979, WVY 79-83' (4) USNRC Letter to VYNPC dated September 24, 1980 (5) USNRC Letter to GE dated February 23, 1979 (6) USNRC Letter to VY dated August 7, 1978 | (2) VYNPC Letter to l'ONRC dated October 11, 1978, WVY 78-92 (3) VYNPC Letter to USNRC dated July 27, 1979, WVY 79-83' (4) USNRC Letter to VYNPC dated September 24, 1980 (5) USNRC Letter to GE dated February 23, 1979 (6) USNRC Letter to VY dated August 7, 1978 | ||
==Dear Sir:== | ==Dear Sir:== | ||
==Subject:== | ==Subject:== | ||
Reactor Protection System (RPS) Power Supply | Reactor Protection System (RPS) Power Supply In References (2) and (3) Vermont Yankee committed to perform increased' surveillance and additional testing of the RPS Motar-Generator sets. | ||
In References (2) and (3) Vermont Yankee committed to perform increased' surveillance and additional testing of the RPS Motar-Generator sets. | It was, and still is, our opinion that these changes, coupled with minor equipment-modifications, would satisfy the concerns regarding operability of the RPS Motor-Generator Sets. | ||
Consequently, as required by Reference'(4), Vermont Yankee proposes to install the required Class _-1E protective circuitry by the end of the next refueling outage. This commitment ~is made assuming that no unforeseen | However, Reference (4) states that the use of alarms or shift surveillance is only acceptable as an interim measure and not-adequate for the long-term solution. | ||
For the long-term solution, modifications should be made to provide fully redundant Class IE protecti'on at the interface of the non-Class 1E power supplies and the RPS. | |||
difficulties will be encountered in procuring the necessary equipment. Design information and proposed Technical Specifications for the-modified protective system will be submitted prior-to start up. The protective circuitry packages we plan to use are similar to those which were found acceptable in References (4) and (5).. | Consequently, as required by Reference'(4), Vermont Yankee proposes to install the required Class _-1E protective circuitry by the end of the next | ||
~ | |||
refueling outage. | |||
This commitment ~is made assuming that no unforeseen difficulties will be encountered in procuring the necessary equipment. Design information and proposed Technical Specifications for the-modified protective system will be submitted prior-to start up. | |||
The protective circuitry packages we plan to use are similar to those which were found acceptable in References (4) and (5).. | |||
T3 01300g | T3 01300g | ||
U.S. Nuclear Regulatory Commission | U.S. Nuclear Regulatory Commission January 27, 1981 Attention: | ||
Mr. Thomas A. | |||
Very truly yours, VERMONT YANKEE NUCLEAR P0h'ER CORPORATION N | Ippolito, Chief Page 2 k'e t ru s t that the information provided is adequate; however, should you have any questions, do not hesitate to call. | ||
Very truly yours, VERMONT YANKEE NUCLEAR P0h'ER CORPORATION N | |||
Y L. 11. He id e r Vice President SFU/kab l | |||
l | l | ||
.}} | |||
Latest revision as of 17:15, 24 December 2024
| ML19341B227 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 01/27/1981 |
| From: | Heider L VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| FVY-81-15, NUDOCS 8101300487 | |
| Download: ML19341B227 (2) | |
Text
,+
VERMONT Y AN N EE NUCLEAR POWJCR CORPOR ATION SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTLAND. VF.RMONT 05701 FVY 81-15 REPLY TOs ENGINEERING OFFICE 1671 WORCESTER HOAD F R A kuNGH A M. M ASS ACHUS ETTs ot 7of itLEPHONt et7 872-8tOO
-3 January 27, 1981 wJ 23 United States Nuclear Regulatory Commission Washington, DC 20555 n;
g3 M
5
[$
Attention:
Office of Nuclear Reactor Regulation Thomas A.
Ippolito, Chief Operating Reactor Branch #2 Division of Licensing Re ferences : (1) License No. DPR-28 (Docket No. 50-271)
(2) VYNPC Letter to l'ONRC dated October 11, 1978, WVY 78-92 (3) VYNPC Letter to USNRC dated July 27, 1979, WVY 79-83' (4) USNRC Letter to VYNPC dated September 24, 1980 (5) USNRC Letter to GE dated February 23, 1979 (6) USNRC Letter to VY dated August 7, 1978
Dear Sir:
Subject:
Reactor Protection System (RPS) Power Supply In References (2) and (3) Vermont Yankee committed to perform increased' surveillance and additional testing of the RPS Motar-Generator sets.
It was, and still is, our opinion that these changes, coupled with minor equipment-modifications, would satisfy the concerns regarding operability of the RPS Motor-Generator Sets.
However, Reference (4) states that the use of alarms or shift surveillance is only acceptable as an interim measure and not-adequate for the long-term solution.
For the long-term solution, modifications should be made to provide fully redundant Class IE protecti'on at the interface of the non-Class 1E power supplies and the RPS.
Consequently, as required by Reference'(4), Vermont Yankee proposes to install the required Class _-1E protective circuitry by the end of the next
~
refueling outage.
This commitment ~is made assuming that no unforeseen difficulties will be encountered in procuring the necessary equipment. Design information and proposed Technical Specifications for the-modified protective system will be submitted prior-to start up.
The protective circuitry packages we plan to use are similar to those which were found acceptable in References (4) and (5)..
T3 01300g
U.S. Nuclear Regulatory Commission January 27, 1981 Attention:
Mr. Thomas A.
Ippolito, Chief Page 2 k'e t ru s t that the information provided is adequate; however, should you have any questions, do not hesitate to call.
Very truly yours, VERMONT YANKEE NUCLEAR P0h'ER CORPORATION N
Y L. 11. He id e r Vice President SFU/kab l
l
.