2.3. Manufacturing Requirements  2.4  PGET Services Requirements  2.5 Deliverables  6 The Contractor shall:  2.3.1 In strict conformity with the design documentation, acquire or manufacture all components  necessary for the PGET. The components and the modifications listed in Annex C have to be  executed by the contractor.  2.3.2 Assemble all components into a fully functioning system and test prior to delivery to DG  ENER-E.  2.4.1 Modify and enhance PGET hardware and software periodically as required.  2.4.2 Carry out repairs as required to keep PGET in fully operational condition  2.4.3 Provide and ensure availability of the spare parts indicated in Annex B for the full lifetime  of PGET.  2.4.4 Provide an alternative replacement option having equivalent characteristics if a particular  component is not available.  2.4.5 Implement the changes described in Annex C, including:  •  Modification of cabling with an easily replaceable cable and connector;  •  Modification of the torus housing to allow routine leak testing;  •  Redesign of gamma-ray collimators according to DG ENER-E specification;  •  Re-sizing of gantry components to accommodate new collimators, as needed.  2.5.1 The Contractor shall provide complete PGET as follows:   A watertight compartment (torus) with all detector, mechanical, and electronic  components mounted and properly connected. External surfaces of the torus shall  be electroplated to allow easier decontamination;   Control unit with a data acquisition system computer;  Connecting cable in a halogen-free protective sleeve;   Installation disk with the system-setup and data-acquisition software;   Documentation: Test reports, User Manual, and Software Manual. One hundred and seventy four (174) CdZnTe front-end detection modules that  have been specifically developed for PGET by RITEC http://www.ritec.lv/   Two (2) Boron-10 detectors RS-B1-0403-231 with two (2) pre-amplifier PDT30A; 