1. National Legal Framework 2. RR Background information 3. - - PowerPoint PPT Presentation

Cairo, 28 September - 02 October 2014 By Mr Petrus BOMPERE LEMO CNPRI (Comité National de Protection contre les Rayonnements Ionisants):The sole Regulatory Body of DR Congo

Overview of the DRCongo’s Regulatory Boby Supervision of the Research Reactor « TRIGA Mark II »

• 1. National Legal Framework
• 2. RR Background information
• 3. Inspections of RR

• 1. National Legal Regulatory Framework

CNPRI, the DRCongo’s RB : Created by the

law 017/2002

Empowered to regulate, license, inspect

(control), and enforce law and regulations;

Under the high autority of the DRCongo

President and under the supervision of the Minister in charge of Scientific Research.

• 1. National Legal Regulatory Framework

Nuclear act (Law 017/2002) describes the:

General Regulatory and safety provisions, Category of nuclear materials, Physical protection of nuclear materials and

facilities conditions,

Prepardeness and emergency planning, Enforcement.

• 1. National Legal Regulatory Framework

Decree No 05/022 (2005):General Nuclear

Regulations

 Detailed General Regulatory Provisions;  Exemption and Exclusion from regulatory supervision;  Categories of Practices and Facilities;  Nuclear Security Requirements;  Occupational, medical and public exposures;  Licensing requirements;  Inspections; and  Waste management.

• 2. RR Background Information

6

TRIGA

Training Research Isotope production General Atomics

1 MW TRIGA MARK II RESEARCH REACTOR OF CREN-K

• 2. RR Background Information (Cont’d)

Triga Mark I (decommissioned since 1970) : 1958-1970 Construction

• f Triga Mark II

: 1970-1971 1st criticality : 24 /03/1972 Reactor at 50 kW : 13/04/1972 1st Pulse : 10/06/1974 Reactor at full power (1 MW) : 10/07/1974 Shutdown for repair works on vessel : 24/03/1988 Restart after repair : 21 /03/1989 Extended shutdown since : Nov. 2004 MAJOR MILESTONES:

• 2. RR Background Information (Cont’d)

Thermal power output : 1000 kW Nominal transient peak power in Pulse Mode : 1600MW Fuel – moderator material Uranium : 8.5% wt ZrH1.6 : 91.5%wt Uranium enrichment : 19.9%

Reactor characteristics

• 2. RR Background Information (Cont’d)

Fuel cladding Material : type 304 SS Nominal thickness : 0.5mm Fuel Element dimensions Geometry : Cylinder External diameter : 3.76 cm Total length : 72.06 cm Meat height : 38.1 cm Reactor characteristics (cont’d)

• 2. RR Background Information (Cont’d)

Nbr of Fuel Elements (type 104 GGA) : 66 Nbr of Control Rods (type 304 FFCR) : 3 Pure absorbent borate graphite pulse rod : 1 Nbr of graphite dummy element : 16 Neutron source : Ra-Be. Moderator : demineralized water (light water) Reflector : graphite

• 2. RR Background Information (Cont’d)

Cooling systems: Primary water system: demineralized water in a forced close circuit circulating in SS pipes (max. flow rate: 80 m3/h) Secondary water circuit: 2 pumps (max flow rate: 140 m3/h), 4 cooling towers, and reserve water tank: capacity 11 m3.

Reactor characteristics (cont’d)

• 2. RR Background Information (Cont’d)

Control console and reactor instrumentation: 5 control channels One Start-up channel with BF3 detector (OK) One Log and Linear power channel, fission chamber detector (defected) One 15 range GA Multirange Picoammeter (Linear channel 1), compensated ion chamber (OK). One 16 decades H & B Linear channel 2, uncompensated ion chamber (OK) One pulse channel, uncompensated ion chamber (defected)

Reactor characteristics (cont’d)

• 2. RR Background Information (Cont’d)

CURRENT STATUS OF THE REACTOR:

EXTENDED SHUTDOWN (since 2004)

REASONS :

Originally, failure at Period module of Startup and Log Power Channel: reactor scram. INSARR mission of October 2004: Findings of additional technical and management problems to be solved before re- start the reactor.

• 3. Inspections of RR

 Previous inspections of the Triga Mark II RR

have been carried out by the IAEA experts; the most important was the INSARR mission in 2004 which identified a lot of issues that led to the shutdown of the RR.

 The CNPRI conducts inspection missions

whose objective is to follow up the INSARR findings and recommendations. Inspection of RR

• 3. Inspections of RR

 The RB mission has reviewed documents related

to Radiation Protection, nuclear safety, daily staff assigned to the reactor, guides of good practices, radioactivity monitoring of the RR;

 Documents reviewed: INSARR mission Report,

PIL( Physical Inventory Listing) and MBR (Material balance Report) missions Report, RASCA Mission Report, RR periodic test Reports, Log Book, etc…

Inspection of RR (cont’d)

…Thanks you for your attention…