ML092010070

E-mail from M. Modes of USNRC to J. Richmond of USNRC, Regarding Ut. Draft Write-up for Oc

ML092010070
Person / Time
Site:	Oyster Creek
Issue date:	01/12/2009
From:	Modes M Engineering Region 1 Branch 1
To:	Richmond J Engineering Region 1 Branch 1
References
FOIA/PA-2009-0070
Download: ML092010070 (3)

Text

ýONS Nathan Lafferty From: Michael Modes Sent: Monday, January 12, 2009 2:08 PM To: John Richmond

Subject:

RE: UT Draft Write-up for OC Yes that is ok.

No we do not have to explain in more detail.

From: John Richmond Sent: Monday, January 12, 2009 2:07 PM To: Michael Modes

Subject:

UT Draft Write-up for OC Michael, Is this ok, or do we need to explain in more detail?

L (b)(5)

From: Michael Modes Sent: Monday, January 12, 2009 10:26 AM To: John Richmond

Subject:

RE: Reason For Fiberglass in the Containment Annulus at Oyster Creek I was really close to establishing the Part 50 documented basis for the drywell examinations, the ACRS and hearing files contain all the relevant historical documents. We went into a great deal of hjstorical detail on the very same subject when 1-hey dumped the iolv bottle- ... did they violate a Part 50 recuirmentL (b)(5)

(b)(5)

L__

I am directed to focus on my feeders.

Therefore:

(b)(5)

I will now move on to the other two feeders: Bellows, and Fatigue.

From: John Richmond Sent: Monday, January 12, 2009 9:56 AM To: Michael Modes; Harold Gray

Subject:

RE: Reason For Fiberglass in the Containment Annulus at Oyster Creek I continue to learn! thanks for the update.

From: Michael Modes Sent: Monday, January 12, 2009 9:12 AM To: Harold Gray

&*xan InINS wec was deleted i oe withlthe Freedom of Informatdon Act lon 1 i+APA *_m -

Cc: John Richmond

Subject:

Reason For Fiberglass in the Containment Annulus at Oyster Creek Follow up to our recent conversation.

This is from an '87 calculation performed to determine drywell integrity. I found it while researching an unresolved item proposed by John Richmond and Rich Conte.

"A two-inch gap was formed with fiberglass between elevations 12' 3" and 23' 6". Above 23' 6" a three-inch gap was formed with Fire-D. The gap depths were established by design to permit unimpeded expansion of the drywell shell during any design condftion. The materials were selected to resist crushing by the concrete during pouring but allowing crushing by induced vessel expansion."

2

Received: from R1CLSTRO1 .nrc.gov ([148.184.99.7]) by R1 MS01 .nrc.gov

([148.184.99.10]) with mapi; Mon, 12 Jan 2009 14:08:09 -0500 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: Michael Modes <MichaeI.Modes@nrc.gov>

To: John Richmond <John.Richmond@nrc.gov>

Date: Mon, 12 Jan 2009 14:07:32 -0500

Subject:

RE: UT Draft Write-up for OC Thread-Topic: UT Draft Write-up for OC Thread-Index: AQHJdL+v/xQVf76p8Oa/ALOcnusOXY9WojOAgAAE2w2AAEBMsIAAATE8 Message-ID: <2856BC46F6A308418F033D973BBOEE72AA60EF77A3@R1CLSTR01 .nrc.gov>

References:

<2856BC46F6A308418F033D973BBOEE72AA60EF779F@R1 CLSTRO1 .nrc.gov>,<2856BC46F 6A308418F033D973BBOEE72AA612C01 3A@R1 CLSTRO1.nrc.gov>

<2856BC46F6A308418F033D973BBOEE72AA60EF77A1 @R1 CLSTRO1 .nrc.gov>,<2856BC46 F6A308418F033D973BBOEE72AA612C0475@R1 CLSTRO1.nrc.gov>

In-Reply-To: <2856BC46F6A308418F033D973BBOEE72AA612C0475@R1CLSTRO1.nrc.gov>

Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach:

X-MS-Exchange-Organization-SCL: -1 X-MS-TN EF-Correlator:

<2856BC46F6A308418 F033D973BBOEE72AA60EF77A3@R1 CLSTR01. nrc.gov>

MIME-Version: 1.0