NTP Radioisotopes SOC Ltd A subsidiary of Necsa SOC Ltd Pelindaba, South Africa Site Briefing: New Hydrogen Sampling System Project 2020/02/18 www.ntp.co.za NTP-SOP-2004-04 Rev 15
Contents A. BACKGROUND B. SCOPE C. EXECUTION D. Q&A
BACKGROUND Due to presence of H 2 and air (O 2 ) in the purge gas it is vital to monitor the hydrogen LEL from a safety perspective The H 2 conc. is required as an input in order for the Various gasses are hot cell PLC to take released, one of corrective action, before which is H 2 conc. exceeds the LEL of hydrogen (4% v/v) Nuclear Material is dissolved in a hot cell to extract radioactive isotopes, used for diagnoses and treatment in the field of nuclear medicine
BACKGROUND The main project objective is the installation of a hydrogen gas monitoring system that is compliant with the necessary regulatory and quality requirements. The functions of the hydrogen gas monitoring system shall be to: - Extract a sample from the off gas stream (from the HVAC system located outside the hot cell) - Condition the sample (if required) - Analyse the sample for H2 gas volume concentration - Transmit the H2 gas concentration signal to the hot cell PLC; and - Return the analysed sample to the same off gas stream where the sample was taken
SCOPE Work Scope Contractor Employer Phase 1 Basic Engineering Package (BEDP) Responsible Detail Engineering Package (DEDP) Responsible Design reviews (GA, P&ID, loop diagrams, HAZOP etc.) Responsible Participate Procurement and Manufacturing Responsible Assemble and integration Responsible Factory Acceptance Responsible Participate Packaging shipping and delivery Responsible Phase 2 Installation Responsible Support Cold Commissioning Responsible Support Site Acceptance Testing Responsible Participate Training of the Employer’s staff Responsible Participate Phase 3 Hot Commissioning Support Responsible Start-up and Initial Operation Support Responsible Performance Tests Support Responsible
Execution Envisaged execution options/proposals are as follows: 1. Original Equipment Manufacturer providing full solution 2. Engineering Contractor subcontracting the Original Equipment Manufacturer 3. Consortiums between Engineering Contractors and Original Equipment manufactures Due to the Nuclear Classification Nature of the hydrogen Analyser system, which is Safety class-2 component the following are Mandatory from the bidders: • Suppliers of the services to have ISO 9001: 2008 or Later Certification • Supplier to be qualified by employer for services in line with QCL-2 component supply requirements • Ensure compliance to nuclear safety class-2 requirements in design and supply of the components. • Relevant experience in gas monitoring systems with track record supplied • Technology Performance Guarantee and Remote Maintenance Support
Questions and Answers
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