ML082590101

E-Mail and Instrument Air Dryer Information

ML082590101
Person / Time
Site:	Calvert Cliffs
Issue date:	09/04/2008
From:	David Silk Division of Reactor Safety I
To:	Cyndy Bixler Operations Branch I
Hansell S
Shared Package
ML073040307	List: IR 05000317/2008301 ML080500246 ML081570277 ML081690586 ML081690602 ML081690630 ML081690652 ML081690697 ML081690719 ML082210499 ML082210511 ML082210541 ML082210551 ML082210558 ML082480504 ML082590046 ML082590056 ML082590058 ML082590064 ML082590076 ML082590080 ML082590082 ML082590084 ML082590093 ML082590101 ML082590478 ML082620009 ML082810364 ML090490608
References
Download: ML082590101 (3)

Text

From: David Silk Sent: Thursday, September 04, 2008 2:57 PM To: Cyndy Bixler

Subject:

FW: Instrument air dryer info.

Attachments: U-1 Air Dryer Mod.doc; Compressed Air System Description.doc; U-2 Air Dryer Mod.doc; Conley - Instr Air Dryer.ppt Follow Up Flag: Follow up Flag Status: Flagged I found this in my in-box and these files need to be added to the post-exam comment references. Thanks.

From: Wasem, Mike [1]

Sent: Thursday, August 21, 2008 7:52 AM To: David Silk

Subject:

FW: Instrument air dryer info.

Dave-Pages 16 through 20 of the Compressed Air system description(below) explain normal and loss of power effects to the Air Dryers.

It also explains that, with a loss of power to the dryers, the K-26 alarm will be annunciated. Looking at the ARM, it agrees with the system description-- the alarm is caused by: 1) Instrument air pressure less than 93 PSIG 2) 11/12 Dryer Malfunction.

Under the automatic actions, the description of what happens at 93 PSIG is also what happens on a loss of power to the dryer. See Response in the alarm manual for K-26, page 50. Notice that the action for loss of power or lower air pressure is the same--when the cause has been corrected, reset the IA dryer.

Again, the point contested is, given only the air pressure of 96 PSIG, no mention of an alarm or a white light being brightly lit, you cannot definitively say that an air dryer has lost power (or ANY malfunction exists).

If you need different information, or want this in a different format, please call me at Nick's number, 410 495-4586.

Thanks Mike Wasem CCNPP Supervisor-ITU (410) 495-3638

______________________________________________

From: Wasem, Mike Sent: Wednesday, August 13, 2008 4:00 PM

To: 'dms3@nrc.gov'

Subject:

Instrument air dryer info.

Here is information on the IA dryer modification that changed the effect that a loss of power has on the dryers.

<<U-1 Air Dryer Mod.doc>>

<<Compressed Air System Description.doc>>

<<U-2 Air Dryer Mod.doc>> <<Conley - Instr Air Dryer.ppt>>

Picture (Enhanced Metafile)

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Mike Wasem CCNPP Supervisor-ITU (410) 495-3638

>>> This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. CEG-IP1 E-mail Properties Mail Envelope Properties (2856BC46F6A308418F033D973BB0EE72841E946F06)

Subject:

FW: Instrument air dryer info.

Sent Date: 09/04/2008 2:57:09 PM Received Date: 09/04/2008 2:57:09 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 969995 09/04/2008 U-1 Air Dryer Mod.doc 46394 Compressed Air System Description.doc 329594 U-2 Air Dryer Mod.doc 43322 Conley - Instr Air Dryer.ppt 483180 image001.png 20810 image002.png 32966 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: Follow up. Start by Friday, September 05, 2008. Due by Friday, September 05, 2008