STATEMENT OF WORK. Refurbishment of the cooling system of the Nuclear Research Reactor at the Nuclear Center "Dr. Nabor Carrillo Flores".

Transcription

1 STATEMENT OF WORK Refurbishment of the cooling of the Nuclear Research Reactor at the Nuclear Center "Dr. Nabor Carrillo Flores". Page 1 of 8

2 STATEMENT OF WORK 1. Introduction This Statement of work (SOW) describes the requirements for the refurbishment of the cooling of the nuclear research reactor at the Instituto Nacional de Energia Nuclear (ININ), in its Nuclear Center "Dr. Nabor Carrillo Flores, located on the Mexico-Toluca Highway s/n, La Marquesa Ocoyoacac, Mexico, where the work will be performed. The Institute has a nuclear reactor TRIGA Mark III in operation since 1968 which is used for the training of personnel, for scientific research and for the production of radioisotopes. The reactor has now a cooling that requires being refurbished. The IAEA plans to provide assistance to the Government of Mexico, in the framework of the technical cooperation project MEX2016, to modernize ININ s nuclear reactor 2. Scope The contractor shall provide a complete "turnkey" solution, i.e., which must include all the technical drawings, all the equipment deemed necessary to achieve the aim of this technical specification, the equipment needed for its installation and proper operation (stands, cables, pipes, ladders, cranes, scaffolding, etc.) as well as all the administrative and technical labour necessary to install and deliver to the ININ a full operating, including: - The removal of the existing motor pumps (P1 & P2), cooling tower T1 and all its associated components; (see Fig 1) - The provision of new motor pumps P1 & P2, cooling tower T1 and its associated components; - The installation of new motor pumps P1 & P2, cooling tower T1 and its associated components. - The provision of complementary masonry work. 3. Existing cooling and its function (Fig 1) The refurbishment shall maintain the following characteristics and functions of the existing cooling : When the research reactor operates at 1 MW power, the cooling has the following functions: a) Remove the heat generated in the fission process and maintain the temperature of pool water for long irradiations at a temperature below 40 C. b) Have a water flow in the primary cooling of at least 350 GPM with a temperature difference between the inlet and outlet of 11 C; c) Have a water flow in the secondary cooling of at least 700 GPM Page 2 of 8

3 with a temperature difference between the inlet and outlet of 5.5 C; The components of the cooling are: Primary cooling : a) Water of the reactor pool (working fluid in the primary cooling ); b) A 256 plates Heat exchanger; c) Motor pump (P1) of 15 HP and 3600 RPM, with capacity to pump 350 GPM; d) Water treatment (ion exchange resin mixed bed); e) A conductivity meter at the inlet and outlet mixed bed resins tank; and f) Temperature gauges placed at the inlet and outlet of the heat exchanger. g) Pressure gauges placed at the inlet and outlet of the heat exchanger Secondary cooling : a) Water of the cooling tower (working fluid in the secondary cooling ); b) Cooling tower (T1); c) Motor pump (P2) of 40 HP and 1800 RPM with capacity to pump 700 GPM; d) Fan at the top of T1 with a 10 HP motor; and e) Temperature gauges placed at the inlet and outlet of the heat exchanger. f) Pressure gauges placed at the inlet and outlet of the heat exchanger NOTE: The heat exchanger is the common element between the primary cooling and the secondary cooling Operating conditions of the cooling during operation at 1 MW a) primary cooling : i.water flow: 350 GPM; ii. Temperature drop: 11 C (from 35 C to 24 C). b) secondary cooling : i.water flow: 700 GPM; ii. Temperature drop: 5.5 C (from 27.5 to 22 C). Page 3 of 8

4 P1 FIG. 1: Schematic of cooling P2 T1 4. Scope of work 4.1. The contractor shall perform the following services: Perform the necessary engineering for dismantling, construction and erection of the cooling. Disconnect all electrical components before dismantling and removal of the existing cooling tower, motor pumps and its components. Dismantle and remove the existing cooling tower. Dismantle and remove the motor pump P1 in the primary cooling. Dismantle and remove the motor pump P2 in the secondary cooling ; Dismantle and remove all obsolete equipment, obsolete pipes and obsolete electrical components connected to the existing cooling tower and motor pumps in the primary cooling and secondary cooling. Remove from the ININ premises the dismantled cooling tower, motor pumps, its debris and all the obsolete parts that were dismantled, after obtaining clearance from ININ Clean and prepare the area to enable the future installation of the new cooling tower, motor pumps and its associated components (such as placement of supports for the cooling tower, civil works, painting and/or coating the area, construction of concrete slabs, etc.); Transport the new cooling tower and motor pumps to the assigned location, Assemble and install the new cooling tower, motor pumps and associated components and s (pipes, valves, fittings, etc.); Perform the electrical installation of the new cooling tower, motor pumps and associated components and s: installation of electrical boards, Page 4 of 8

5 electrical cables, control panels, wiring devices, electric motor(s), inverters, etc.; Perform the following complementary works in the cooling tower area: (see Annex 1): - Construct approximately 6 m 2 of brick wall in the existing tank. - Coat the inside of the existing tank with ceramic tiles (approx. 50 m 2 ) - Construct a concrete slab over the existing tank (5.5x5.5m to support the new cooling tower); - Supply and install a metallic platform at the top of the tower, for future maintenance work of the fans. - Supply and install a guardrail in the free area of the slab enabling a ladder to access the level of the slab; 4.2. The contractor shall provide the following parts: I. A motor pump (P1) with the following characteristics Flow: 350 GPM; Type: Centrifugal, horizontal, stainless steel (wet parts), Inlet/outlet diam: 4/3 Motor: 15 HP, direct coupled, 3600 RPM, 3 phases (3/60/ V); TDH: 15 mts; NPSHR: 7.5 mts; II. III. A motor pump (P2) with the following characteristics Flow: 700 GPM; Type: Centrifugal, horizontal, stainless steel (wet parts), Inlet/outlet diam: 6/4 Motor: 40 HP, direct coupled, 1800 RPM, 3 phases (3/60/ V); TDH: 45 mts; NPSHR: 5.5 mts; A complete cooling tower (T1) with the following characteristics: Capacity to handle 700 GPM; Temperature drop: >5.5 C (inlet T: >27.5 C, outlet T: 22 C); Power rate : 1100 kwfans : 1 or 2 IV. Depending on the type of selected tower, additional accessories as needed, shall be provided such as: aluminium ladder with protection, walking platform with handrails, electrical level control for the water tank, vibration switch for duct fan, etc.; V. The electrical components and their installation associated to the cooling tower and pumps shall be included in the provision. VI. Provision of mechanical components (valves, pipes, etc) associated to the motor pump and the cooling tower shall be provided. Page 5 of 8

6 5. Deliverable Data Items The Contractor shall provide, in the Spanish language: Two weeks before starting the site works, a programme of activities, broken down by day. Monthly progress reports including photos A set of operation and servicing manuals of the new cooling tower and new pumping equipment; The as-built engineering drawings, mechanical diagrams, electrical diagrams and layout of the new cooling tower, motor pumps and its associated components (pipes, parts and s connected to the new cooling tower, new pumping equipment, etc.) located inside and outside the new cooling tower; Drawings and blue prints must be delivered in Autocad and two hard copies. The specifications of the new cooling tower and new pumping equipment; Certificates or documents that confirm the technical characteristics of components (declaration of conformity Certification from the supplier of correct installation of components (IQ). Acceptance tests reports A maintenance plan 6. Quality Requirements The Parts shall be manufactured, shipped and installed in accordance with the Contractor s ISO quality assurance or an equivalent quality assurance. The Service shall be provided in accordance with the Contractor s ISO quality assurance or an equivalent quality assurance. The Contractor shall document the compliance with this quality assurance. The new cooling shall meet USA Cooling Technology Institute (CTI) standards or equivalent standards applicable for cooling s. 7. Applicable Documents USA Cooling Technology Institute (CTI) standards or equivalent standards applicable for cooling s. The specifications engineering drawings, mechanical diagrams, electrical diagrams and layout of the existing cooling and its associated components (pipes, parts and s connected to the existing cooling tower, pumping equipment/pump, etc.) located inside and outside the existing cooling tower; all these documents are at ININ and will be available to the supplier of the service during the onsite visit. Page 6 of 8

7 8. Verification of engineering, installation and supply of components, and functionality of the System The detailed construction and erection engineering must be approved by the end user before starting the construction and erection phase. The components, prior to shipment, shall be tested for conformance of with manufacturer s performance specifications and the minimum requirements specified herein. The acceptance tests of supplies and services will be carried out by the contractor immediately after the installation of all the supplies and the checking of its proper functioning. These tests consist of the verification of compliance of the technical and functional requirements of this technical specification and documents here mentioned. Protocols for the acceptance tests shall by approved in advance by IAEA. The results of the testing of the System shall be documented by the Contractor in an acceptance test report countersigned by the End-User (ININ). Acceptance tests results shall be approved by IAEA at its satisfaction. The final (as built) engineering shall be approved by the end user upon completing the erection. 9. Delivery time The supply shall be completed within a period of 14 weeks after the issuance of the purchase order. 10. Other considerations The Contractor shall observe the following important considerations when presenting its proposal: Please note the Instructions to Bidders concerning site visit. Unless otherwise specified, the work will begin at 8:30 am. and will end at 17:30 from Monday to Friday, if an extended or weekend schedule is needed a request should be send to the Manager of the Reactor Department 24 hours in advance and is subject to his approval. The ININ will restrict the access to certain areas when the Nuclear Reactor is in operation, informing the contractor with 24 hours of anticipation. The contractor shall provide, one week after the signature of the contract, in written the address where he will receive reports of failures or emergencies, as well as data, name, address, telephone, and cell phone or equivalent, of service and support staff to maintain an agile communication in case of failures. The contractor shall provide to his staff appropriate safety clothing and equipment to perform the work, as well as to deliver to the Department of the Nuclear Reactor, the list of staff to be authorized to entry to the facilities. When work is to be performed at elevated height, the working staff and the tools must be secured to lifelines at all times. Labor, tools and safety equipment for the installation of the new cooling tower, motor pumps and its associated components shall be provided by the contractor; Page 7 of 8

8 The contractor must notify to ININ, prior to the Service, if a crane or special equipment/tools have to be used in order to allow ININ to make its own on-site arrangements to allow access to the crane or special equipment/tools provided by the contractor ; Page 8 of 8