GB-Bristol: Ion Chambers
Key facts
- Contract value
- £43,770
- Awarded
- 27 Mar 2015
- Contract starts
- 27 Mar 2015
- Contract ends
- 27 Apr 2015
- Procedure
- Open procedure
- Buyer type
- Central government
Awarded to
| Supplier | Value |
|---|---|
| PTW-UK Limited | £43,770 |
Description
The Chemical, Biological, Radiological and Nuclear (CBRN) Delivery Team (DT) has a requirement to procure quantity seven 1000cc spherical ion chambers to support tertiary level calibration of Radiation Detection and Monitoring Equipment (RDME) used within the Ministry of Defence (MoD). The authority currently uses the Unidos electrometer model type 10002, therefore the ion chambers required must be compatible for use with this instrument.
The chambers must meet the following specifications:
1. Ion Chamber Type: Guarded (Air Equivalent) Vented. 2. Connector Type: TNC (Male) 3. Volume: 1000cc 4. Sensitivity: â¥40 µC/Gy 5. Collection Efficiency: â¥99% 6. Mounting: Rigid Stem 7. Measurement Range: â¤0.1mSv/h to â¥0.3Sv/h 8. Energy Range: 40 keV to 1.3 MeV (â¤Â±4% across the range) 9. Directional Dependence: â¤+0.5% (for rotation around the chamber axis - â¤Â±5% (for tilting the axis up to ±45 degrees) 10. Short Term Stability: Readings taken within 2 hours after warm-up shall be within ±0.5% of those taken directly after warm-up 11. Long Term Stability: Readings taken over a prolonged period of operation shall be within ±1% of those taken directly after warm-up 12. Post Irradiation Leakage: Signal to drop to 1% within 5s after irradiation. 13. Leakage Current: â¤10fA 14. Maximum Bias Voltage: 500V (positive / negative potential) Nominal +/-400V 15. Polarity Effect â¤Â±1% 16. Extension Cable: 10m (TNC Female to TNC Male) 17. Cable Leakage: â¤1pC/(Gy.cm)
Each ion chamber must be accompanied with a check source and fixture to enable a geometrically reproducible location of the source.
The Contractor shall be responsible for:
1. The manufacturer of seven identical 1000cc ion chambers. 2. The delivery of the chambers.
Additional information: The contracting authority considers that this contract may be suitable for economic operators that are small or medium enterprises (SMEs). However, any selection of tenderers will be based solely on the criteria set out for the procurement, and the contract will be awarded on the basis of the most economically advantageous tender.Upon expression of interest the supplier is requested to please state whether they are willing and able to trade electronically via P2P.
The contracting authority considers that this contract may be suitable for economic operators that are small or medium enterprises (SMEs).
The contract start and end date are estimated dates and will be confirmed during the ITT stage.
Categories (CPV)
- 38580000 Non-medical equipment based on the use of radiations
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