ML13143A321 Hardened vents for BWRs

I sent the following e-mail to NRC on June 20, 2013.  So far there is no reply.

ML13143A321 Hardened vents for BWRs
Date:	6/20/2013 11:03:19 A.M. Mountain Daylight Time
From:	Bobleyse@aol.com
Reply To: To: Rajender.auluck@nrc.gov To: Rajender.auluck@nrc.gov

Sir:

ORDER TO MODIFY LICENSES WITH REGARD TO RELIABLE HARDENED CONTAINMENT VENTS.

The pages are not numbered, but on page 33 of 36:

1.2 The HCVS shall include the following design features:

1.2.1 The HCVS shall have the capacity to vent the steam/energy equivalent of one
(1) percent of licensed/rated thermal power (unless a lower value is justified by analyses), and be able to restore and then maintain containment pressure below the primary containment design pressure and the primary containment pressure limit.

Please e-mail a list of references that justify the one percent.

Bob Leyse   bobleyse@aol.com

Zirconium is reactive Old News

John W. Simpson (1914 - 2007) had a diverse career with Westinghouse and he left behind a great record with his book, Nuclear power from underseas to outer space, copyright American Nuclear Society, 1995.  Following is copied from two pages, and it is revealing as well as entertaining. 

Core Exit Thermocouples, Some Interesting history

This is an early document.  Click to view the entire page.  Core exit thermocouples have survived as a primary warning of core uncovering.  In the case of LOFT experiment L2-5, core exit thermocouples severely misled the plant operators.

And here is a the related analysis from Oak Ridge National Laboratory:

And, here is a detailed analysis by ORNL:
http://www.ornl.gov/info/reports/1982/3445605701648.pdf
Here is the cover page and one paragraph from page 81.  In general, the report supports HJTCs as monitors of inadequate core cooling.

Core Exit Thermocouples

So, I've been away for a while.  There is a peristent mindset that core exit thermocouples are great for detecting inadequate core cooling.  More later on this.

UHI Ultra High Risk, October 3, 1984 28th Anniversary

So, today is the 28th Anniversary of my infamous memo.

Where are all of the participants now?

Some are hiding and some are lost.  Sandia still is alive and I'm working on getting the unfinished business taking care of.

Right now I have to leave town, but I'll be back to celebrate this 28th anniversary!

UHI Ultra High Risk, October 3, 1984: Unfinished Business

Yes there is unfinished business.  I've discussed the work by Sandia.  Duing 2006, I did not get approval to present a POWER POINT discussion of this.  Here is the abstract that I submitted.  The report by Sandia was very restricted in scope by the NRC, very likely because the NRC then, like now, did not really have any skills in analyzing field experience and relating that to risks. There is a CATCH, those who may be good at it are not allowed to do it. 

Here is the abstract that I submitted to the program manager at INL during June 2006.

the

UHI Ultra High Risk October 3, 1984, OHI and Watts Bar