ML20155H236
| ML20155H236 | |
| Person / Time | |
|---|---|
| Issue date: | 03/04/1986 |
| From: | Higginbotham L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Mccoy S NUS CORP. |
| References | |
| REF-WM-20 NUDOCS 8605150078 | |
| Download: ML20155H236 (4) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION u
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Recently, NRC has received information which seems to indicate that short duration (lessthan28 day)cementcuringpriortoperformingwater immertion testing, may not be conservative for giving an indication of the resistance of a resin-cement waste form to water immersion. As this may be e phenomenon associated with the incomplete hydration and cure of the cement am.-
in order to determine what is a conservative cure time, we are requesting specific information on pretreatment and curing procedures from all cement vendors involved in the topical report review process.
Specifically, we are requesting that you provide your procedure for the preparation and curing of solidified lab scale (or fullscale if applicable) resin samples prior to performing water immersion tests for 10 rFR Part 61 qualification testing.
Please include information on the foi
.ing; (1) *.he time the sample is allowed to cure prior to water immersion, (2) the temer!ture i
experienced by the solidified form during curing, (3) the relative humidits
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and/or moisture conditions experienced by the form during the curing orocess.
(4) the methods used to accelerate cure (for example, convectional oven heating or the addition of salts), (5) the resin pretreatment and mixing methods and apparat s, and (6) any data which supports the conservatism of your choice of cure period and cure conditions.
Finally, we have contracted with Brookhaven National Laboratory (BNL) to perform limited confirmatory testing to provide an indication of the effect o' cure time on the ability of a resin-cement waste form to meet the test critt:ria for resistance to water immersion.
BNL may be contacting you in order to obtain additional information. We thark you for your cooperation in st.pplying 0G a s~L M h8 k
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2-the needed information.
If you have questions in this regard, please contact Tim Jchnson a: (301)427-4088 or Roy Person at (301) 427-4513.
- ncerely, ddsl:1 low-levelWIs/otham, Chief LeoB,ligd te and Uranium Recovery Projects Branch Division of Waste Management i
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3 I U L-l-RECElvyfEMORANDUM FEB 17 1986 5:
D. J. MILLER To Distri>1 tion Date February 14, 1986 From Bill Phillips Subject Strmmv of 10 GR 61 Discussions with NRC ad DOE 1.
I received a call from Pay Person of Tim Johnson's NRC staff and Tim Johnson. Tim noted that they had heard that STOCK was still having difficulty solidifying resins and he wanted to set up a conference call with DDE Brookhaven to discuss what he roted to be a STOCK for-mula problmi with resins aM cment.
I attempted to decline, noting that test was ongoing and facts not all in. He noted he wanted to help us solve our problan and tlrught Brookhaven could help, based upon their emerience.
2.
On Thursday, February 13, a conference call was made. On the line were:
Tim Johnson, hTiC Bill Phillips, STCG Roy Person, hPC Dan Miller, SKCK Chuck Patterson, NBC Terry Lee, STOCK Paul Piciulo, Brookhaven Fritz Podnore, SK CK Paul Piciulo covered their test experience with mixed bed resins solidified with cerent. Details are cantained in IUREG/CR3444, dated February '85, entitled, The Impact of INR Dewntaminations on Solidification Waste Disposal and Associated Occupational Ex;rsure.
Paul covered the details of test and the results in a lengthy dis-cussion (read the report for details).
I noted to Paul that their data denotes a difference in results for 7 day and 28 day cure sanples and, further, the report did not note a single successful 28 day cure time inmersion test.
We discussed cure tine (7 day, 28 day) STOCK results to date. Chuck Patterson noted that the use of lime was important. Terry Ice then explained in detail hcu SKCK depleted resins and that we had utilized nurrerous different approaches to depletion in our test.
Paul Piciulo and Terry Ice spent much tiate explaining various aspects of testing with the NRC.
Tlr whole test program was covered.
The following items are worthy of note:
a) NRC
'Nenty-eight day cure tine is an important para:reter and should be used by SKCK for cantinued testing as, technically, the carent iMustry recognizes 28 days as a technically important period of tilre.
b)
S'IOCK - tbthing fails in simulated sea water.
c)
Brookhaven - No 7 day cure time data for resins would be acceptable due to cure time waste form hydraulic functions.
Stock Equipment Company A Unit of General Signal Form 67.P10M SM 4/45
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rf To: Distribution February 14, 1986
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d)
Brookhaven - Iware that very short cure tim = (1-2 days), resins -
would probably all pass 10 CFR 61.
e)
Brookhaven - Longer curing period, beyond 28 days, of waste tested has passed 10 CFR 61. Maybe 28 days should be extended to longer period.
f)
S70CK - Waste loadings being tested by all vendors are 2 to 5 times Brookhaven loadings, mostly by 4 to 5.
Brookhaven and NRC were not aware of the wide varience.
I noted to Tim Johnson that what we oculd ship, Class A, in our 55-gallon drun would require 4 drums if STOCK used Brookhaven loadings. CWners find that unacceptable --
IdARA, processing time, econtraics.
We must find a high loading fonnulation that works. Other vendors roa have good formulas in their 7bpicals. Tim Johnson rated our problem.
Action Follow-Un - Expect Brookhaven personnel to visit S70CK to revies our data.
NRC to get back to us.
WSP/ew cc:
P.B. Cadou P.S. Hunt G.E. Kaneen T.A. Lee
~DiJ. Miller F.H Pod: Tore P.C. Williams
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