Development of waste acceptance

procedures in Slovenia

Technical Meeting on Training and Demonstration of Waste

Disposal Technologies within the Framework of the

International Low Level Waste Disposal Network (DISPONET) —

Waste Acceptance Procedures

Soulaines-Dhuys, France, 26–28 June 2012

ARAO – Agency for Radwaste Management Bojan Hertl; bojan.hertl@gov.si

Nuclear Facilities in Slovenia

Austria

Italy Croatia

Hungary

RR Triga Mark II

NPP

Uranium Mine Žirovski vrh

LILW storage

IAEA Safety Requirement and Guides for RWM processes

RWM process from the cradle to the grave

(NS-R-2: Safety of Nuclear Power Plants: Operation)

SSR-2/2 Safety of Nuclear Power Plants: Commissioning and Operation (2011) NS-G-2.7: Radiation Protection and Radioactive Waste Management

in the Operation of Nuclear Power Plants

Life cycle of nuclear facilities (waste producer)

(WS-R-2) GSR Part 5: Predisposal Management of Radioactive Waste

WS-G-2.5: Predisposal Management of Low and Intermediate Level Radioactive Waste;

DS448: Predisposal Management of Radioactive Waste from Reactors (2010)

Predisposal processes

(WS-R-1 + WS-R-4) SSR-5: Disposal of Radioactive Waste (2011) DS356: Near Surface Disposal of Radioactive Waste

SSG-14 Geological Disposal Facilities for Radioactive Waste (2011)

Life cycle of disposal facilities (waste operator)

Methodological approach for developing WAC

4

Preparation of the preliminary WAC for disposal in Slovenia has

been done under the following conditions:

1. Repository site selection procedure was under way (a short-

listed site Vrbina, Krško)

2. Design documentation for the repository was in an early

stage

3. An evaluation was reviewed of the total radioactive

inventory expected in Slovenia (the evaluation includes

operational waste from the Krško Nuclear Power Plant

(NEK), decommissioning waste from NEK and TRIGA,

small producers - CSRAO in Brinje)

4. A preliminary analysis of long-term safety has been

prepared

5. Qualitative (analytical) characterization has been made of

radioactive waste disposed at the NEK SRSF (solid

radwaste storage facility) and the preliminary WAC for this

storage facility prepared;

6. A characterization procedure has been partially carried out

for radioactive waste stored at the CSRAO in Brinje, and

necessary WAC have been prepared for acceptance and

storage of this waste

Methodological approach for developing WAC

Waste Streams Studies

Analytical Characterization

Raw Wastes Waste Forms Waste Packages

1. Evaporator Concentrates 2. Spent Ion Resins 3. Spent Filters 4. Compressible Waste 5. Non-compressible Waste 6. Specific Waste

Evaporator Concentrates: Process Scheme

Evaporator Concentrates: Waste Forms/Waste Packages

EBD5

Solidification Supercompaction EBC

EBCD6

EBCT1

EB Waste Stream (vermiculite-cement matrix)

Evaporator Concentrates: Waste Forms/Waste Packages

IDDS

DCH1 DCH1/T2

DC Waste Stream (IDDS)

Final package for disposal (N3 vs. N2 concrete container)

N3 N2

Proposed optimized waste classification system

With respect to the WPS and aligned with the identified waste streams and with a revised waste package system proposed waste classes are:

Class LLW-1 is intended for very low level waste (VLLW) and low level waste (LLW) not subject to clearance but with surface dose rate below 0.5 mSv/h.

Class LLW-2 is intended for all other LLW meeting the 2 mSv/h criteria (surface dose rate, definition of low level waste).

Class ILW-1 is intended for ILW suitable to be transported as an IP-2 package after loading into the disposal container.

Class ILW-2 is intended for other ILW not increasing 200 mSv/h surface dose rate.

Class ILW-S (special waste) is intended for reactor internals with surface dose rates above 200 mSv/h, and for sealed sources with individual or combined high total activity.

Proposed optimized waste classification system

Based on the critical nuclides (Cl-36, Ni-59, Nb-94, Ag-108m, I-129), the

maximum concentration for these nuclides has been derived, except

for Ca-41, by applying:

0.1 % of the total inventory for certain critical nuclides as a maximum total

activity in Class LLW-1 containers and

1 % of the total inventory for certain critical nuclides as a maximum total

activity in Class LLW-2, ILW-1 and ILW-2 containers

For Ca-41 the following will apply:

1 % of the total inventory for Ca-41 as a maximum total activity in Class

LLW-1 containers and

10 % of the total inventory for Ca-41 as a maximum total activity in Class

LLW-2, ILW-1 and ILW-2 containers

No limitations have been derived for the ILW-S waste packages as

container type not yet has been selected.

AGENCIJA ZA RADIOAKTIVNE ODPADKE (ARAO)

Parmova 53, Ljubljana, SLOVENIJA

Tel: +386 1 236 32 00

Fax: +386 1 236 32 30

www.arao.si

public.arao@gov.si

Thank you for your attention!

Bojan Hertl

e-mail: ime.priimek@gov.si

tel.: +386 1 236 32 14