ML20058N918
| ML20058N918 | |
| Person / Time | |
|---|---|
| Issue date: | 08/13/1990 |
| From: | Wick E NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Surmeier J NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| REF-WM-3 NUDOCS 9008150248 | |
| Download: ML20058N918 (9) | |
Text
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7-25-90/ MEETING '
MEMpRANDUM FOR: John J. Surmeier, Chief MG18112 Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS THROUGH:
Michael Tokar, Section Leader Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS FROM:
Everett Wick Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS
SUBJECT:
SUMMARY
OF JULY 25, 1990, MEETING BETWEEN LLWM, EPRI AND i
NUMARC J
The subject meeting summary is enclosed.
This sunanary highlights EPRI's preliminary presentation of its study to evaluate the technical basis for waste form stability in 10 CFR Part 61.
EPRI estimated that a report of the study will be issued in early 1991.
Wnal Signed By l
Everett Wick Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS
Enclosure:
Meeting summary cc: Attendees w/ enclosure i
Distribution: GentralIfileM02-2 NMSS r/f LLTB r/f JAustin VMiller/sp LWick Secy 'PReed/RES/WMB Engineering Section/LLTB JTaylor MTokar HThompson RBangart NMSS Division Directors JSurmeier MSilberberg PLohaus PDR YES NO Category:
Proprietary or CF Only i
ACNW YES 4
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i SUBJECT ABSTRACT:SEE SUBJECT DING i
b 0FC :LLTB g g :LLTB NAME:EWick
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i' MEETING
SUMMARY
l DATE:
July 25, 1990 i
TIME:
9:00 am to 11:00 am PLACE:
OWFN Room 13-B-9 PURPOSE: TO DISCUSS AN EVALUATION STUDY BY EPRI 0F THE TECHNICAL BASES FOR THE WASTE FORM STABILITY REQUIREMENTS IN 10 CFR Part 61 PARTICIPANTS:
NRC EPRI i
Michael Tokar, NMSS/LLTB Carol Hornibrook Joseph Kane, NMSS/LLTB JeneVance.(VanceAssociates)
Robert Shewmaker, NMSS/LLTB Everett Wick, NMSS/LLTB NUMARC Phil Reed, RES/WMB Richard Bangart*, NMSS/LLWM Lynne Fairobent John Greeves*, NMSS/LLWM l
John Surmeier*, NMSS/LLTB Bechtel Michael Weber *, OCM/KC George Gaydos
- Part Time Matthew Gudrini L
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SUMMARY
1 1.
Jene Vance summarized some preliminary conclusions of the EPRI study as follows:
Waste form stability may not be as important as site stability (because of long-lived radionuclides)
Alternatives to waste 1vrm stability may provide effective recognizability Deeper burial (isolation) may provide adequate protection of intruder without waste form stability for both Class B and Class C t
1 wastes E
Site operating practices may be more effective than waste stabilization.
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Site stability is required for grountwater protection.
Limiting site inventories of long-11ted mobile radionuclides is the ultimate control.
DAW (Dry All Waste - this is large volume waste that has very little radioactivity, e.g., clothes, goggles, gloves, syringes, wa11 coverings and footwear) should be placed in separate trenches.
Concentrations of lon -lived radionuclides are low..NRC's Prototype-License App ication Safety Analysis Report, however, shows some problems with long-lived radionucifdes.
2.
This EPRI study is a small project.
Codes supporting 10 CFR Part 61 were abandoned early on due to difficulties.
Thereaf ter, EPRI reviewed only the 10 CFR Part 61 documentation.
1 3.
The Workshop on Cement Stabilization of Low-Level Radioactive Waste and subsequent discussions on this subject led to this EPRI study.
4.
EPRI stated that its purpose in this meeting with NRC is to establish the groundwork for future discussions.
EPRI and NUMARC want to provide input i
to any modification or clarification of 10 CFR Part 61.
NRC said-that 10 CFR Part 61 will be revised at some time to make it consistent with the new dose requirements of 10 CFR Part 20 and with other parts of Title 10 that have been revised.
5.
EPRI thinks 10 CFR Part 61 should have a longer-term view to address the more mobile long half-lived radionuclides.
This is a problem whore states determine M rce terms from the manifests.
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NUMARC is more concerned about materials licensees than reactors.
7.
EPRI will report on its waste form stability work in early 1991.
8.
The industry generates about 24 million pounds of waste per year.
Approximately 90 percent of the nuclear power plants have announced the intent to send DAW to incineration because of the great volume reduction (VR) that it offers (VR's are of the order of 100 - 200 to 1).
Scientific Ecology Group (SEG, a Westinghouse subsidiary) has the capacity to incinerate about half this material. Thus, it is likely that another one or two incinerators will be built. Quadrex and one other company have expressed interest in providing incinerator services.
An EPRI handout summarizing the presentation is enclosed.
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Enclosure:
As stated pg' Everett Wick Senior Materials Engineer Technical Branch Division of Low-Level Waste Management and Decommissioning, NMSS 1
E WC4 o st/AMF 1
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TECHNICAL EVALUATION OF THE BASES WASTE FORM i
STABILITY IN 10CFR61 l
by J.N.VANCE VANCE & ASSOCIATES for meeting with NRC STAFF July 29,1990 N
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D Purpose of Study
. To.de.- mo,. ei,%i.oi. iorm siebuny,e,*em.nis enticipated from NRC.
To provide e beste for future resserch to address future weste form etability problems.
To provide a beste for future resserch to sosist in alting and licensing problems for new LLW disposal lecilities.
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Approach
- Perform limited review of original 10CFM1 methedology.
. IdentNy soonerlos and barrier feetore rolsted to weste form.
identify nuelldet making dominent contributione to DOSE.
Reconstruct the conceptual modele and logie structure.
Roach concluelone on the mesours of protection provided by weste form etability in scenerlos.
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Objectives of EPRI Project Evoluete the technleel besse for weste form etsbility requiremente contained in 10CFM1 To gain en understanding of the technical bases for weste form etability, i
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Discussion topics In 10CFM81 Documentation l
. Repeated eletoments that weste lotm s' ability enhances alte stability.
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Poet problems of subeldence correctly attributed to :
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. Poor Packaging j
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. Comptoselble Weste
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. Degredation of Weste l
. Random Plecoment
. Poor Backfilling l
. Poet Compaction Most problems attelbuted to DAW.
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Discussion (cont'd) l
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k le not likely that sny reduction in leeching een be assumed for weste form in the long-term.
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h le inconclushre it weste term etability for non DAW weste (or i
even DAW) will add to site stability in the (long term).
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Discussion (eent'd) t The sonoluelene of the EPN etudy offer e memowhat different view of 10CFfM1 in that i
. Weste form etabilky may not be se important to she etsbility, i
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. Alternettves to weste form etsbility may provide effective 3
"recogniastility".
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. Dooper buriel(looletten) may provide edequate protection of intruder without weete form etsbility for both olees B and C westee.
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Discussion (eent'd)
However.
No attempt to esperate she operating practioes from weete form.
No attempt to sense the impoet of unstabilized, non. DAW westes.
for groundwetor protootion, e short term view le adopted.
The effects of a finite life of weets form etsbility are not
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addressed.
Finite life of the weste form etability le addressed for intruder (Lo. Claes C).
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Discussion (cont"d)
The sonotuelene of the EPRI etudy support and reinforce 10CFR$t in several mehr ways t
. Segregation of DAW le essentiel, intruder protection le required for class B and C westes.
Class C westes require additional inttuder protection, such as i
deeper burial (looletten).
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. Site etability is required for groundwater protection.
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. Limhing she inventerlee of long lived mobile nucildes le the l
ultimate control.
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