ML110620532

2011/01/21 Diablo Canyon Lr - Information Request - Diablo Canyon - Neutron Noise

ML110620532
Person / Time
Site:	Diablo Canyon
Issue date:	01/21/2011
From:	Office of Nuclear Reactor Regulation
To:	Division of License Renewal
References
Download: ML110620532 (4)

Text

1 DiabloCanyonNPEm Resource From: Poehler, Jeffrey Sent: Friday, January 21, 2011 7:58 AM To: Kemper, William

Subject:

RE: Information request - Diablo Canyon - Neutron noiseBill, Thanks for getting back to me-

Jeff Poehler

From: Kemper, William Sent: Thursday, January 20, 2011 5:22 PM To: Poehler, Jeffrey

Subject:

RE: Information request - Diablo Canyon - Neutron noise Jeff, Sorry for the delay in responding-still catching up fr om the month of AL I t ook in December. No, EICB is not involved with this type of equipment. This equipment is not tech. spec equipment, or safety related and is more orientated to the Core Analysis business area. I doubt if Rx. Systems would be involved with this equipment ei ther. Sorry I couldn't help more.

Thanks,

Bill Kemper, EICB/DE/NRR

301-415-0927

301-873-6274 (BB)

From: Poehler, Jeffrey Sent: Monday, December 20, 2010 8:17 AM To: Kemper, William

Subject:

FW: Information request - Diablo Canyon - Neutron noise Bill, Would your branch be involved in reviewing neutron noise monitoring? See forwarded message from Alan Wang in DORL. I don't think CVIB has ever been involved with this. The two branches I thought of were I&C Branch and Reactor Systems in NRR/DSS.

Thanks, JeffreyC.PoehlerSr.MaterialsEngineerNRR/DCI/CVIB(301)4158353 2 From: Wang, Alan Sent: Friday, December 17, 2010 3:53 PM To: Poehler, Jeffrey

Subject:

FW: Information request - Diablo Canyon - Neutron noise Jeff, I got the Matt is away message. Could you help me with this. Thanks alan From: Wang, Alan Sent: Friday, December 17, 2010 3:51 PM To: Mitchell, Matthew

Subject:

FW: Information request - Diablo Canyon - Neutron noise Matt, Mike Cullingford had this request from someone from the Spanish NRC?. They saw the Diablo article and was wondering if it might have implications for them. I am not sure what issue with the Trillo plant is but when I read the link it appears to me that the "neutron noise" was instrumentation we placed inside the reactor to look for vibration and loose parts. Do you know if we have any information regarding this type of instrumentation to determine vibration or loose parts? It is not clear to me what "neutron noise" they are detecting unless they too are using a similar technology for loose parts. If you have any insights on this I would appreciate it. Alan

From: Cullingford, Michael Sent: Friday, December 17, 2010 9:49 AM To: Wang, Alan

Subject:

FW: Information request - Diablo Canyon - Neutron noise Hi Alan: Could you please guide me as to who is the appropriate person (if not yourself) for me to get the answer to this question? Thank you, mike From: FRANCO MATILLA, Fernando [1]

Sent: Friday, December 17, 2010 4:48 AM To: Fehst, Geraldine

Subject:

Information request - Diablo Canyon - Neutron noise

DearGerri,

OnbehalfofoneCSNCommissioner,weareinterestedinobtainingsometechnicalinformationfromtheNRC.Asyoumayknow,wehavebeenexperiencingabnormalneutronnoiseinTrilloNPP.TheanalysiscarriedoutbythelicenseeandtheCSNisunderprogress,withthecooperationofourGermancolleagues(TrilloisGermandesign),whoarecarryingoutsimilaranalysis.Inrelationtothis,thefollowingnewshasdrawnourattention:http://www.neimagazine.co m/story.asp?storyCode=2056532 WewouldbeinterestedinobtainingsomeinformationabouttheroleoftheUSNRCincaseithasbeeninvolvedintheassessmentofthisissue.Sofar,oursearchattheUSNRCwebsitehasbeenunsuccessful.WoulditbepossibletogetadditionalinformationregardingtheevaluationofthissituationbytheNRC?Thankyouverymuchforyourcooperation, FernandoFranco 3

Hearing Identifier: DiabloCanyon_LicenseRenewal_NonPublic Email Number: 2646 Mail Envelope Properties (19D990B45D535548840D1118C451C74D7B645E1375)

Subject:

RE: Information request - Diablo Canyon - Neutron noise Sent Date: 1/21/2011 7:57:41 AM Received Date: 1/21/2011 7:57:00 AM From: Poehler, Jeffrey Created By: Jeffrey.Poehler@nrc.gov Recipients: "Kemper, William" <William.Kemper@nrc.gov>

Tracking Status: None

Post Office: HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 3807 1/21/2011 7:57:00 AM

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