ML101820034
| ML101820034 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 05/19/2010 |
| From: | Office of Nuclear Reactor Regulation |
| To: | Division of License Renewal |
| References | |
| 06-848-02-LR | |
| Download: ML101820034 (3) | |
Text
1 PilgrimRenewal NPEmails From:
Regner, Lisa Sent:
Wednesday, May 19, 2010 5:26 PM To:
'Mogolesko, Fred' Cc:
Jones, Steve
Subject:
Pilgrim DRAFT RAIs - Buried Piping and EDG Fogger Housing Attachments:
EDG Fogger Housing DRAFT RAI - to Entergy.doc
- Fred, As discussed this morning, attached is the DRAFT RAI on the EDG fogger housing. I apologize for the delay in the buried piping DRAFT RAI.
Please confirm you can support the following the EDG conference call next Tuesday.
Take a look at supporting a buried piping call next Thursday.
- Thanks, LisaRegner PaloVerdePM LicenseRenewal 3014151906
Hearing Identifier:
PilgrimRenewalNonPublic_EX Email Number:
46 Mail Envelope Properties (89515C5A6407354784A897CABE08E52D0DED28161A)
Subject:
Pilgrim DRAFT RAIs - Buried Piping and EDG Fogger Housing Sent Date:
5/19/2010 5:26:14 PM Received Date:
5/19/2010 5:26:00 PM From:
Regner, Lisa Created By:
Lisa.Regner@nrc.gov Recipients:
"Jones, Steve" <Steve.Jones@nrc.gov>
Tracking Status: None
"'Mogolesko, Fred'" <fmogole@entergy.com>
Tracking Status: None Post Office:
HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 410 5/19/2010 5:26:00 PM EDG Fogger Housing DRAFT RAI - to Entergy.doc 30202 Options Priority:
Standard Return Notification:
No Reply Requested:
No Sensitivity:
Normal Expiration Date:
Recipients Received:
Request for Additional Information Pilgrim License Renewal Application Changes
Background:
Item 5 of the Pilgrim Annual Update, submitted by letter dated December 28, 2009, deletes the "fogger housing" component type from the license renewal application (LRA) Table 2.3.3-4, "Emergency Diesel Generator System Components Subject to Aging Management Review;"
and LRA Table 3.3.2-4, "Emergency Diesel Generator System Summary of Aging Management Evaluation." LRA Table 2.3.3-4 identified the intended function of the fogger housing as a pressure boundary. LRA Table 3.3.2-4 identified the fogger housing material as copper alloy
>15% Zn with an internal environment of untreated air and an external environment of indoor air. This material/environment combination is different than the material/environment combination for other emergency diesel generator (EDG) components.
Section 2.3.3.4 of the LRA included the following discussion:
The EDG system has the following intended function for 10 CFR 54.4(a)(1):
Provide power to essential AC busses during a loss of offsite power.
The air start and turbo air assist systems support the startup and operation of the emergency diesel generators. Each EDG engine is started by high pressure air, which powers the air motors to crank the engine and start combustion.
Issue:
LRA Drawing M219 showed a component identified as a "Motor Oil Fogger" in the piping supporting delivery of pressurized air from the EDG air receivers to 1 of the 2 sets of 2 air motors relied on to start the "A" EDG and to both sets of 2 air motors relied on to start the "B" EDG. Thus, the staff concluded that "fogger housing" described a unique component type whose integrity would be necessary for accomplishment of the EDG intended function for 10 CFR 54.4(a)(1).
Request:
Expain:
- 1) how the fogger housing is no longer required to support the EDG intended function
- 2) how the pressure boundary function is being achieved