ML19336A764
| ML19336A764 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/24/1980 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Martin B, Vissing G Office of Nuclear Reactor Regulation |
| References | |
| 1-100-22, 2-100-17, NUDOCS 8010310394 | |
| Download: ML19336A764 (2) | |
Text
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ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 UTTLE ROCK. ARKANSAS 72203 (501)371-4000 October 24, 1980 1-100-22 2-100-17 i
Director of Nuclear Reactor Regulation ATTN: Mr. Guy Vissing, Project Manager Operating Reactors Branch #4 U. S. Nuclear Regulatory Commission I
Washington, D.C.
20555 Director of Nuclear Reactor Regulation i
ATTN:
Mr. Bob Martin, Project Manager Operating Reactors Branch #3 U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
In response to your information request on RCS pressure isolation check valves for Arkansas Nuclear One, Units 1 & 2, the following information is forwarded to you.
1.
Check Valves on Unit 1:
Velan B13-3114B-13MS Swing Check Velan B19-3114B-13MS Swing Check Velan B19-3114B-13MS Swing Check Stop Check Valves on Unit 2:
Atwood & Morrill 12626-01 Swing Check Anchor Valve Co.
6522-1-5 Tilt Disc Check Weston 75450 Swing Check
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2.
Date of last visual inspection of internals:
Unit 1: date of installation Unit 2:
1978 3.
Date of last individual hydrostatic test:
Unit 1: None Unit 2: Start-up 1978 80.10310394 k
MEMBENDOLE SWm WDES SWEM
r October 24, 1980 4.
Date of last ISI/IST operability test:
Unit 1: September 5, 1980 Unit 2: September 4, 1980 I
5.
MOVs are normally closed on both units.
6.
M0Vs are quarterly cycled on both units.
7.
Local guage is checked before opening M0V on Unit 1.
Unit 2 is equipped with pressure transmitter.
8.
No valves have been known to lack integrity on either unit.
9.
Plant modification will be required to accomplish individual hydrostatic test on Unit 1.
No modifications are necessary on Unit 2.
10.
Unit I does not have a pressure indicator between the two check valves.
Plant modification is now underway for pressure indicator installation.
There is no remote indicator on Unit 1.
Unit 2 has a pressure indicator and pressure transmitter between checks.
11.
Date of next plant outage:
Unit 1: January, 1980 Unit 2: March, 1980 Very truly yours, bNb' David C. Trimble Manager, Licensing DCT:PMil:1p f
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