ML082620009
| ML082620009 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 08/15/2008 |
| From: | David Silk Operations Branch I |
| To: | Cyndy Bixler Operations Branch I |
| Hansell S | |
| Shared Package | |
| ML073040307 | List:
|
| References | |
| Download: ML082620009 (2) | |
Text
From:
David Silk Sent:
Tuesday, September 02, 2008 3:34 PM To:
Subject:
FW: Unit 1 Instrument Air Mod--in Word Attachments:
U-1 Air Dryer Mod.doc Follow Up Flag:
Follow up Flag Status:
Flagged ADAMSAccessionNumber:
ml082460832 Add this ML082460832 From: Wasem, Mike [1]
Sent: Friday, August 15, 2008 9:55 AM To: David Silk
Subject:
Unit 1 Instrument Air Mod--in Word
<<U-1 Air Dryer Mod.doc>>
Hope this allows you to open the doc.
Mike Wasem CCNPP Supervisor-ITU (410) 495-3638
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Subject:
FW: Unit 1 Instrument Air Mod--in Word Sent Date: 09/02/2008 3:33:52 PM Received Date: 09/02/2008 3:33:52 PM From: David Silk Created By: David.Silk@nrc.gov Recipients:
Cyndy.Bixler@nrc.gov (Cyndy Bixler)
Tracking Status: None
Post Office:
R1CLSTR01.nrc.gov Files Size Date & Time MESSAGE 56197 09/02/2008 U-1 Air Dryer Mod.doc 46394 Options Expiration Date:
Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: Follow up. Start by Tuesday, September 02, 2008. Due by Tuesday, September 02, 2008
PROCEDURE REVISION/CHANGE Procedure: OI-19-2, AOP-7D-2, 2C13 General Description of Change:
Installing a Mod to 11 IA Dryer to which will cause it to fail safe (fail safe = de-energize, place both towers in service and isolate purge exhaust) on lowering IA press (93 =/- 1 psig) or loss of power to the dryer, also when 11 dryer fails safe it will annunciate the INSTR AIR SYS MALFUNCTION alarm on 1C13 and brightly lite the 11 dryer malfunction light. The Mod consists of installing a Purge exhaust isolation CV in the purge exhaust line and a reset pushbutton. The IA Dryer will have to be reset to allow it to return to regular service.
OI-19 modified section 6.8, startup of 11 AI dryer, to incorporate new reset switch.
Added a new section 6.23, resetting an IA dryer, to allow operators to reset 22 IA Dryer when needed. Added new valves to valve lineup.
AOP-7D Added the automatic actions to the notes section of the AOP. Also added a note to steps V.B.3 and VI.A.4 to alert the operator to expect the malfunction alarms for 11 IA dryer when IA press reaches 93 psig.
1C13 added the automatic actions to window k-26, INSTR AIR SYS MALFUNCTION, and also added the new possible causes (loss of power to 11 dryer or lower air pressure (93 psig)). Split out responses for 11 and 12 dryers.