ML17339A719
| ML17339A719 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 03/19/1980 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0578, RTR-NUREG-578 800310-01, 800310-1, L-80-88, NUDOCS 8003240424 | |
| Download: ML17339A719 (8) | |
Text
REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
II 1
ACCESSION NBR:800324042M DOC ~ DATE: 80/03/19, NOTARIZED:
NO DOCKET FACIL:50 250 Turkey Point Pla'ntg Unit 3i Flotjda Power and Light C
05000250 50 251 Turkey Point Planti Unit 0r Florida Power and Light C
05000251 AUTH'AME AUTHOR AFFILIATION, UHRIGiReE ~
Florida Power 8 Light Co.
REC IP ~ NAME RECIPIENT'FFILIATION SCHHENCERpA ~
Operating Reactors Branch 1
SUBJECT:
Forwards addi-info-re implementation schedules for TMI short term lessons L'earned Task Force requirementsrper NRC'00306 requests Describes containment jsolation mods~
revised operating procedures 8 control switch
- mods, DISTRIBUTION CODE:
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. BOX 529100, MIAMI,FL 33152 JI'tvvvA FLORIDA POWER 4 LIGHTCOMPANY March 19, 1980 L-80-88 Office of Nuclear Reactor Regulation Attention:
Mr. A. Schwencer, Chief Operating Reactors Branch gl Division of Operating Reactors U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555
Dear Mr.- Schwencer:
Re:
Turkey Point Units 3 5 4 Docket Nos.
50-250 8 50-251 Short Term Lessons Learned The purpose of this letter is to provide additional information regarding the implementation of Short Term Lessons Learned at Turkey Point Units 3 and 4.
The information was requested by the NRC Staff during a telephone conference on March 6, 1980.
This submittal supplements our letters L-80-39 of January 31, 1980 and L-80-79 of March 10, 1980.
Very truly yours, Robert E. Uhrig Vice President Advanced Systems 8 Technology REU/MAS/cph Attachment cc:
Mr J.
P. O'Reilly, Region II Nuclear Safety Analysis Center Harold Reis, Esquire SODAS 4OPgg-PEOPLE... SERVING PEOPLE
'a t
4
ATTACHMENT Re:
Turkey Point Units 3 8 4 Docket Nos.
50-250 8 50-251 Short Term Lessons Learned
- 2. 1.4 Containment Isolation I.
Planned modifications will be developed for the following non-essential containment penetrations:
Penetration P5 - Pressurizer Relief Tank Gas Analyzer Line Remote-manual valve No. 552 will be made into an automatic isolation valve.
Penetration P25 - Excess Letdown RCP Seal Water Return An automatic isolation valve will,be added.
Penetration P29 - Instrument Air Supply A check valve will be added to provide additional isolation.
Penetration P6 - Pressurizer Relief Tank N2 Supply A check valve will be added to provide additional isolation.
Penetration P42 - N2 Supply to Accumulators A check valve will be added to provide additional isolation.
These modifications are being evaluated to establish the work scope and implementation schedule.
II.
Procedures will be revised as follows:
Penetration P17 - Safety Injection Test and Purge Line The Operating Procedure for performing this test will be revised to require the operator to close the existi ng remote-manual isolation valves after the test is completed or at any time that an abnormal in-containment event occurs.
Penetration P8 - Pressurizer Steam Space Sample Penetration P9 - Pressurizer Liquid Space Sample Penetration P20 - Hot Leg RCS Sample Penetration P55 - Accumulator Sample Lines
4 4
The Operating Procedures for sampling will be revised to require the operator to close the existing remote-manual isolation valves after the sample has been collected or at any time that an abnormal in-contaireent event occurs.
III. The following discussion applies to redundant containment isolation valves with a single ("ganged") control switch:
2819
& 2826 2821
& 2822 2601
& 2600 2603
& 2602 2911
& 2912
& 2913 Instrument Air Bleed Containment Sump Discharge Containment Purge Containment Purge Containment Air Sample (one Control Switch)
(one Control, Switch)
(one Control Switch)
(one Control Switch)
(one Control Switch)
Control circuit separation for these valves has been re-evaluated.
Our basic conclusion is that present control separation complies with the licensing criteria for Turkey Point Units 3 and 4.
However, to preclude the switch mechanism from havi ng any effect on redundant
- valves, we plan to revise the control circuitry to increase the separation between Train A and Train B.
The modification will involve the addition of 5 control switches, with the associated panel and wiring changes.
The activities necessary to implement the modification (equipment procurement, design, etc.)
are in progress.
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