March 17th, 2011 – MACCS calculations capable of 8,000 miles – Usually run to 1,000 miles

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-From: Gonzalez, Sergio
Sent: Thursday, March 17, 2011 8:29 AM
To: Chang, Richard; Schaperow, Jason; Nosek, Andrew; Navarro, Carlos
Cc: Santiago, Patricia
Subject: MACCS Code

Good Morning:

Kathy wants to now by 8:30am How far out can MACCS calculate? What is the limitation? Validation data?

Sergio E. Gonzalez
Program Manager (NSPDP), Special Projects Branch
Division of Systems Analysis
Office of Nuclear Regulatory Research
Phone- 301-251-7453

From: Schaperow, Jason
To: Gibson, Kathy
Cc: Tinkler, Charles; Chang, Richard; Gonzalez, Sergio
Sent: Thu Mar 17 08:38:52 2011
Subject: RE: MACCS Code

Hi Kathy,

I spoke with Charlie at 10:00 last night. He said he checked and MACCS can calculate out to 8000 miles. We usually run it out to 1000 miles. Validation out beyond 30 miles or so gets to be questionable.

Yesterday, Sandia got source terms together for a MACCS calculation. We think we are now in pretty good shape for some MACCS calculations. However, it appears that our key MACCS expert (Nate Bixler) is on travel, possibly here in the DC area. Richard and I are tracking him down now, and should be able to find him once it is around 8:00 Mountain Time (Albuquerque).


From: Gibson, Kathy
Sent: Thursday, March 17, 2011 8:44 AM
To: Sheron, Brian; Uhle, Jennifer
Cc: Scott, Michael; Santiago, Patricia; Holahan, Patricia
Subject: Fw: MACCS Code

Preliminary answers on how far out MACCS can go. We are pursuing further information with Sandia.

From: Sheron, Brian
Sent: Thursday, March 17, 2011 8:55 AM
To: Bowman, Gregory
Subject: FW: MACCS Code

Greg, I got a call last night from Trish Holahan. She was asking about the MACCS code and how far out it could calculate.

I told her I thought it could calculate beyond 50 miles (current limit of the RASCAL code). She said the Chairman wanted to know if it could calculate from Japan to the U.S. west coast. I said I did not know how far it could calculate or the accuracy.

She said the Chairman was asking, and I said that Charlie Tinkler was probably the best person to ask. She said they would try to call Charlie.

Below is the response. I do not know if Trish has seen this yet, or whether she has forwarded it to the Chairman. Can you check with Josh and see that the Chairman either has gotten this, or give it to him.

We are currently having Sandia do MACCS runs with an adjusted source term. And we’ll report out the results when we receive them.

I have to go to a meeting at DOE this afternoon at Bill B’s request, so you can follow up with Jennifer or kathy Gibson. Jennifer will be attending the 10 am alignment meeting today.

From: Bowman, Gregory
Sent: Thursday, March 17, 2011 9:05 AM
To: Borchardt, Bill
Subject: FYI – MACCS Code
Importance: High


I learned from RES that the MACCS Code is capable of running out to 8,000 miles. Sandia is currently conducting code runs with an adjusted source term. However, it sounds like the results might not be all that accurate at that distance.

I understand that the Chairman was interested. I’ll check with Josh to make sure he’s gotten this information.


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