ML13008A354

Email Request for Additional Information,License Amendment Request to Adopt NFPA 805

ML13008A354
Person / Time
Site:	Callaway
Issue date:	01/03/2013
From:	Lyon C Plant Licensing Branch IV
To:	Wink R Union Electric Co, Ameren Corp
Lyon C
References
TAC ME7046
Download: ML13008A354 (2)

Text

Lent. Susan From: Lyon, Fred Sent: Thursday, January 03, 2013 12:14 PM To: rwink@amerin.com

Subject:

FW: ME7046 Additional AFPS, APLA, AND AHPS RAls for Callaway Plant, LAR to Adopt NFPA 805 From: Lyon, Fred Sent: Thursday[ January 03[ 2013 10:42 AM To: 'Elwood, Thomas S'

Subject:

FW: ME7046 Additional AFPB[ APLA, AND AHPB RAIs for Callaway Plant[ LAR to Adopt NFPA 805 FYI, the reviewer for DC Cook won't be back until Monday. Hopefully we can resolve the then. We want the DC Cook and Callaway RAls to worded the same.

From: Lyon[ Fred Sent: Thursday, January 03[ 2013 8:36 AM To: 'Elwood, Thomas B'

Subject:

FW: ME7046 Additional AFPB[ APLA[ AND AHPB RAIs for Callaway Plant, LAR to Adopt NFPA 805 Tom, the staff provided the following for consideration. Thanks, From: Robinson, Jay Sent: Thursday, January 03[ 2013 8:08 AM To: Lyon, Fred Cc: Fields[ Leslie

Subject:

RE: ME7046 Additional AFPB[ APLA[ AND AHPB RAIs for callaway Plant, LAR to Adopt NFPA 805 staff has provided some additional information for FM RAt 03.01 b. The contractor is in Texas so a late morning or early after call would be best if needed. If the following can be provided to the licensee maybe there won't be a need for a phone call on this RAI:

Based on the staffs independent calculations, EPM overestimated the plume radius for scenario C-31. 3618-8 because their calculations appear to be for thermoplastic cable targets. This is an error because the plant only has thermoset cable targets. The effect of the error, if any, is that the ZOI estimates are more conservative.

The intent of the RAI is (1) to advise the licensee that there is an error in the plume radius calculations and (2) to have the licensee confirm on the docket that the error has no (adverse) effect on the results of the risk calculations.

in regards to PRA RAt 35, (Ray Gallucci) agrees to defer the RAI until the wording is resolved for DC Cook. The would be resubmitted at a later So there is no for a phone call.

I am following lip with the reviewers for DC Cook and will see where that RAI is and try to facilitate If you questions, let me know. Thanks. Jay.

From: Lyon, Fred Sent: Wednesday, January 02,2013 7:34 AM To: Fields, Leslie; Robinson, Jay

Subject:

RE: ME7046 Additional AFPB, APLA, AND AHPB RAls for Callaway Plant, LAR to Adopt NFPA 805 Leslie, Callaway requests a clarification phoncon with staff I can set one up using Outlook or you can me available times, Jay's email 11 let me know.

Jay, fyi, the licensee had the following

• Clarification is requested for FM RAt 03.01 b. The RAI states that the independent calculations for fire scenario C-31.3618-8 determined that thermoplastic damage criteria was used to calculate the plume radius. We are having difficulty determining where the NRC is finding this problem and request more specific details about the issue so we can respond accurately.

• PRA RAI 35. We understand that the NRC is discussing a draft RAt for DC Cook that is nearly identical (to our RAI 35) but is being revised. We request the response to PRA RAt 35 on MCR Abandonment be deferred until after the specific RAt wording is resolved at DC Cook and at which time we would answer the revised RAt Thanks, Fred 2