Sunday, February 28, 2016

Upper Head Injection "Good to see it go." Ebersole

Margaret Ryan of Nucleonics Week mailed a note, click on it to view full size:

Friday, February 26, 2016

Sam Untermyer Comment, October 24, 1963

Way back duing 1963, at GE, Vallecitos, I did  quick runs  of Zircaloy -2 and Type -304 Stainless Steel tubes at 2000 Fahrenheit in water-steam for brief times.  I asked San Untermyer for comments.

Click on the sheet below for a full-sized view.

The report was published on April 27, 1964.

Publication Date:
OSTI Identifier:
Report Number(s):
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-65
Research Org:
General Electric Co. Vallecitos Atomic Lab., San Jose, Calif.
Country of Publication:
Country unknown/Code not available

































































































































Wednesday, February 24, 2016

Methyl Cellulose and Ice Condenser Technology - 1984

Here are some email exchanges as I seek data.

Subject: Fwd: Attention Sardar
Date: 2/24/2016 9:52:41 A.M. Mountain Standard Time
From: Send IM to:
The PDR is great!
I need those documents regarding use of methylcellulose bags in ice baskets that are non-public.  Please arrange for PDR to send me those.
With the impending startup of Watts Bar-2, I have renewed my quest for the evolution of ice condenser containment.  I have docs that go back to 1966, however, the ice condenser started sooner than that.
There is no justification for maintaining this significant history as non-public.  It is significant that methylcellulose was considered as late as 1984 which was about 20 years into ice condenser work.
Bob Leyse

Sent: 2/24/2016 7:38:14 A.M. Mountain Standard Time
Subj: RE: Attention Sardar

Today is a good day, I have found the reference document in Adams, but this is non-public.  The other document dated June 28, 1984 is attached.

Document Title: Forwards requests for addl info re GDC 51, "Fracture Prevention of Containment Pressure Boundary," TMI Item III.D.1.1 on primary coolant outside containment & use of methylcellulose bags in ice baskets. Response due 840627.
  In Main Library: 
  Date Docketed: 
  Document Date: 6/18/84
  Estimated Page Count: 8
Author Name: "ADENSAM E G"
  Addressee Affiliation: "DUKE POWER CO."
  Microform Addresses: 67397:001-67397:008
  FACA Document: No
  Case/Reference Number: "TASK-3.D.1.1"; "TASK-TM"

From: []
Sent: Tuesday, February 23, 2016 8:09 PM
To: PDR Resource <>
Subject: [External_Sender] Attention Sardar


I appreciate your patience.  I am curious.  Is it possible to find the attached document in Adams or elsewhwere?  I just happened to have this old copy when I was resurrecting some old files. 


So, it is now March 5, 2016, and via FOIA, NRC has sent old docs regarding potential use of methyl cellulose bags in ice condensers at Duke's Catawba.  I doubt if Duke ever provided answers to the following, however, I am pursuing this to get insight into how complex the ice condenser technology became over two decades following its conception:

Enclosure 3

June 18, 1984
1. A more detailed discussion of methyl cellulose bag material behavior in the presence of steam/water ts needed. Of concern is the time it would take for the bag material to disintegrate.

2. The potential for, and effect of, steam bypassing of the bagged baskets
before the bags disintegrate should be addressed.

3. The potential for non-uniform ice melting, due to the presence of the
bagged baskets, should be addressed. Non-uniform ice melting early in an
accident could lead to selected ice basket meltout and subsequent steam
bypass of the remaining ice.

4. The potential for the methyl cellulose, or the anti-foaming agent included
in the design, beco~ing sources of hydrogen gas should be addressed.

5. The impact on the subcompartment analysis due to the reduced effectiveness  of the ice condenser during the early phase of a LOCA should be analyzed in greater detail and justifications provided for the assumptions used.

Enclosure 4

Structural concerns which should be addressed as a result of removing the
cruciform supports from the bagged ba~kets and replacing them with a cable cruciform system, include:

a) seismic design adequacy of modified ice-basket systems;

b) potential for changes in vibration loads, and dynamic response
characteristics of the modified ice-basket systems when subje~t to
LOCA and/or SSE conditions;

c) the implication of ice weight support being concentrated at the top
of the ice baskets and design adequacy of localized support connections;
d) structur~l integrity of connections between ice-basket segments;

e) the implication of potential changes in load distributions, support
and anchoring conditions;

f) the implication of potential reduction of strengths of materials due to
corrosion or other chemical changes ~s a result of using plastic ice
bags; and

g) the implication of potential changes in the design, erection and maintenance procedures of the ice-basket systems due to the adoption of the ice bags.