ML20024D767
| ML20024D767 | |
| Person / Time | |
|---|---|
| Issue date: | 07/15/1983 |
| From: | Bell M NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| REF-WM-1 NUDOCS 8308080162 | |
| Download: ML20024D767 (11) | |
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Distribution WM404&411 W Tile: 3109.6 JUL 151983 NMss r/f WMHL r/f MJBell & r/f FRCook 3109.6 HJMiller J0 Bunting PDR MEMORANDUM FOR:
The Files FROM:
Michael J. Bell, Chief High-Level Waste Licensing Management 3 ranch Division of Waste Management
SUBJECT:
COMMENTS ON MCC-3 AND MCC-4 Enclosed are coments developed by WM staff for discussion at the MRB Procedures Panel Meeting on July 25, 1983.
Orig *nalSigned By:
Michael J. Bell, Chief High-Level Waste Licensing Management Branch Division of Waste Management
Enclosures:
WM Record file WM Project
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as stated Docket No.
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Comments on MCC-3 (3/15/83) and MCC-4 (4/19/83)
Leach Tests
-A.
Comments comment to both tests.
1.
The tests should allow testing waste form specimens.with radioactive tracers and actual waste' loadings. The scope's should be upgraded to clearly identify these options. The use of radioactive tracers will improve the accuracy of analyses of leachates, filtrates and apparatus for leached elements.
The use of actual radioactive waste forms will provide data to help understand _the effects;of this waste form characteristic on leachability.
2.
Analyses of filtrates should be required. Analyses should address the colloidal nature of the filtrates.
It also would appear desirable to analyze.leachates themselves for colloidal packets.
3.
The Quality Assurance procedures of the laboratory applicable to the tests should be attached to the test reports in order to assure QA information is available at a later date. A'QA staff member should sian the test report that procedures so l
'3109.6/FRC/83/07/12/0 identified were in fact followed and that they conformed with the requirements of the laboratory as required by Section 8.1.
4.
Tests should specifically allow for testing " aged" waste forms to allow comparison with " unaged" forms.
5.
When Teflon is used as a container radiation fluxes should be 4
limited to 10 rads to prevent degradation of the Teflon and uncontrolled effects on leaching of the test specimens.
i 6.
When gold containers are used, particularly in a radiation field, catalytic reaction may take place and lead to invalid conclusions as to leachability of subject waste forms.
Requirements for qualifying gold testing apparatus to assure no catalytic reactions are occuring should be included in the subject procedures.
I 7.
The procedure should allow use of leachants with controlled additives (for example, like the repository water option of Section 5.4 of MCC-4) to help understand how the water chemistry affects the leachability.
For example, colloidal particles may be added to the water to observe the effects of colloids.
L3109.6/FRC/83/07/12/0,
B.
Comments on MCC-4.
1.
Surface preparation for glass shotld allow " broken" surfaces in addition to cut surfaces.
The method for measuring the surface area for irregular surfaces should be described and its accuracy identified in the procedure.
2.
The effects of heat at the surface of the waste form leaching surfaces should be addressed.
An option to have a heated specimen as well as. irradiated specimens should be allowed.
3.
-Macroscale physical composits should include coated ceramic or super calcine particles.
Temperature gradients in leachants should also be allowed.
Where waste forms coatings cannot be separated from the radioactive material as in coated ceramics, there should be no requirement to test the coating separately.
An objective of the test is to rank waste forms as to performance and testing coating without the form will not lead l
l to such ranking.
l 4.
Procedures for checking pumps to assure they do nt contaminate leachants should be identified and required.
l
n 3109.6/FRC/83/07/12/0
' 5.
The.first sentence of the second paragraph of the Scope needs to be edited to clarify identification of sequence test conditions, for example, the words " flow rate ratios of specimen surface area to leachan..." are meaningless.
-6.
Test should provide for use of a " calibration" reference glass or other known leachable material similar to the one being tested.
7.
It is suggested in Section 2.0, Summary, that flow rates of 80, 8 and 0.8 m/yr are reasonably achievable linear flow rates.
It is not clear whether or not this statement refers to reasonably achievable rates in the test apparatus or in a repository
' environment.
It is noted that 0 m/yr is not'an upper limit on flow rates which may occur in a repository if thermal convection cells are present around a waste form or if flow constricting materials are not placed around waste forms.
i C.
Comments on MCC-3.
1.
In the Scope, the words " maximum release" should be maximum i
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release rate.
The maximum release would necessarily depend on-l-
time and would in all cases approach the starting inventory.
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It should use an inert gas for drying.
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DESCM*F#0N sMuse8eL- ~ W REFERHED TO DATE RECEtvt0.Y Dait Transmission of ACC-3, Agitated Power Leach Test Method, MRB-0195, for MJBell Meeting of Procedures Panel-7/25/83 6/7 RCook ENCLOSURES e
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970() Sourk CAss AstNte, ARcpNNE,EliNois 60439 June 3, 1983 MRB-0232 T0:
Members of the Procedures Panel, Materials Review Board FROM:
M. J. Steindler, Chairman, MRB
SUBJECT:
Trant, mission of MCC-3, Agitated Powder Leach Test Method, MRB-0195, for Meeting of Procedures Panel, July 25, 1983 I am herewith transmitting to you the latest version of MCC-3, Agitated Powder Leach Test Method, to which we have given the designation MRB-0195. You are asked to review the documentation with the objective of provisional approval in preparation for the scheduled meeting of the Procedures Panel in Chicago on July 25, 1983.
This is the second time that MCC-3 has been presented to the Panel. The Panel considered MRB-0023 in its meeting in Richland, Washington on October 7,1981, and voted to return it to the Materials Characterization Center (MCC) for revision. The official actions of the Panel were reported in the minutes for that meeting (MRB-0058) copy of which you should have in your possession.
John Mendel's transmission letter included the following enclosures, all of which are attached to this memo:
l 1.
MCC response to the minutes of the MRB review (MRB-0058) of l
the previous MCC-3 submission (MRB-0023).
l l
2.
MCC-3, Agitated Powder Leach Test Method, Supplemental Information, by J. W. Shade (no date), and 3.
Basalt Operating Procedures, Barnes Rocking Autoclaves, RHO-BWI-MA-4, May 1982.
l You will want to consider whether the MCC has responded to the Panel's concerns.
In addition, I call your attention to my letter to John of June 3rd (MRB-0229) which indicates some of the concerns that resulted from the OTC review.
l l
I am hopeful that you can begin your review promptly.
Should time permit, we would welcome receiving your early comments to this version of MCC-3, so that we can forward them to Panel members before the meeting.
USDrpumar d FNRqy Tk UshtRsnyd Oncxp K'-
Procedures Panel 2
June 3,1983
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J If you are lacking any pertinent materials, please let Wally know.
N.{b, v
M. J. steindler,* Chaiman Materials Review Board KIS:WBS:1j
Enclosures:
As stated above cc:
(w/o enclosures)
J. Haugen, DOE-CH/11IO C. Mcpheeters, AllL/MIO H. Frederikse, HBS
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109.6 DESCRsPT40N IMwas to unsw.8.ase REFERHED TO D AT E RECEevfD BY DATE Rtview of MCC-4 (MRB-0212)
MJBell 6/8 ENCLO5URES KEMAHM5 f
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ARGONNE NATIONAL LABORATORY 9X)0 SouTii CAss AstNLE, ARCpAE,l[hOis 60439 Tdeptiort 312/972-4390 June 3, 1983 MRB-0231 TO:
Members of the Procedures Panel, Materials Review Board FROM:
M. J. Steindler, Chaiman, MRB
SUBJECT:
Transmission of MCC-4, Low-Flow-Rate teach Test, (MRB-0212) for Meeting of Procedures Panel, July 25, 1983 I am herewith transmitting to you MCC-4, Low-Flow-Rate Leach Test, to which we have given the designation MRB-0212. You are asked to review the documentation with the objective of provisional approval in preparation for the scheduled meeting of the Procedures Panel in Chicago on July 25, 1983.
John Mendel's transmission letter of April 22nd included the following enclosures, all of which are attached to this memo:
1.
Four figures, cumulative releases of four nuclides (Na, B, Si, and Ca) in dionized water at 90 C.
2.
Summary of response to the OTC/MRB Review (MRB-0125) of the previous MCC-4 submission (MRB-0118).
3.
MCC-4S, Low-Flow-Rate Leach Test Method Supplemental Information, April 1983.
Also attached is the derivation of idealized leaching equations that highlight the importance (or lack thereof) of the A/V ratio (specimen surface area to test volume ratio) and the A/F ratio (surface area to flow ratio) in obtaining reproducible results. This was prepared in response to an earlier version of MCC-4 (not distributed to the procedures panel) in which the A/V ratio was identified as the principal tost parameter.
I also call your attention to my letter to John of June 3rd (MRB-0230) which indicates some of the concerns that resulted from the OTC review of MCC-4.
I encourage you to begin your review promptly.
If time pemits we will be happy to collect pre-meeting comments and distribute them to Panel members before the meeting.
F you are lacking any pertinent materials, please let Wally know.
dndker MA (). O.
Mt J. Steindler, Chairman Materials Review Board KIS:WBS:1j
Enclosures:
As stated above cc: (w/o enclosures)
J. Haugen, DOE-CH/MIO C. Mcpheeters, ANL/MIO H. Frederikse, NBS USDcpvama of Ewy ThE (MtR5ify of GAxp
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