Objective
IT IS COMMON PRACTICE TO MAINTAIN A NEGATIVE PRESSURE IN THE CONTAINMENT OF SHUT-DOWN NUCLEAR REACTORS IN ORDER TO AVOID A TRANSFER OF THE REMAINING RADIOACTIVITY TO THE OUTSIDE.
THE OBJECTIVE OF THE PRESENT CONTRACT IS TO ASSESS, FROM THE STAND-POINT OF RADIATION PROTECTION OF THE ENVIRONMENT, THE ACCEPTABILITY OF SUPPRESSING THE PROVIDED VENTILATION AND, CONSEQUENTLY, THE NEGATIVE PRESSURE IN THE CONTAINMENT OF THE SHUT-DOWN LINGEN BOILING WATER REACTOR PLANT. THE USE OF THE VENTILATION SYSTEM WOULD THEN BE LIMITED TO CASUAL DRYING AND AIR-CONDITIONING PURPOSES.
THE WORK IS AIMED AT DEMONSTRATING THAT SAFE ENCLOSURE WITHOUT NEGATIVE CONTAINMENT PRESSURE MIGHT BE ACCEPTABLE.
After 9 years of operation, the KWL nuclear power plant was shut down and brought to the status of safe enclosure (SE). The main features of the SE and its behaviour in the first 2 years of operation are reported.
The main work done was to evaluate controlled and uncontrolled air exchange with the atmosphere and the airborne radioactivity release. Measurements were performed with a small air system in operation and air exchange without negative pressure in the safe enclosure (SE) was calculated. The activity release was found to be very small. Operation of the SE without negative pressure, therefore, may be acceptable.
1. INVENTORY OF THE RELEVANT PLANT CHARACTERISTICS AND OF THE KEY ISSUES TO BE CONSIDERED.
2. ESTIMATION OF THE ACTIVITY RELEASE TO BE EXPECTED WITH SHUT-DOWN VENTILATION SYSTEM.
3. DESIGN OF AN INSTRUMENTATION SYSTEM AND A MEASUREMENT PROGRAMME FOR THE CONTROL OF THE CONTAINMENT ATMOSPHERE.
4. IMPLEMENTATION OF THE MEASUREMENT PROGRAMME.
5. EVALUATION OF THE OBTAINED RESULTS.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Coordinator
49786 Lingen
Germany
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