Flow rate control method for liquid waste supply tank
Description
The present invention concerns a flow rate control method, in which an air purge type liquid level meter and an air lift pump are disposed to a liquid waste supply tank for supplying high level radioactive liquid wastes to a glass melting furnace. The flow rate of liquid wastes are sampled repeatedly on every predetermined time, the average flow rate on every predetermined time is calculated, and the average flow rate calculated newest and the average flow rate calculated formerly with a primary delay are compared with a set flow rate value respectively to determine each difference. Only when the values are of identical sign, the driving amount of the air lift pump is controlled. Since sampling is conducted for two different time points and only when the calculated values are of identical sign, the air lift pump is controlled, the fluctuation amount of the flow rate can be calculated exactly even undergoing external disturbance on liquid level by a stirrer. (N.H.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 4 p.
- IPC:
- Int. Cl. G21F9/16
- IPC
- Int. Cl. G21F9/16
- Patent number
- JP patent document 11-2695/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 30017233
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- COMPUTER CALCULATIONS; FLOW REGULATORS; HIGH-LEVEL RADIOACTIVE WASTES; LEVEL INDICATORS; LIQUID WASTES; MIXERS; PUMPS; SAMPLING; TANKS; VITRIFICATION
- Descriptors DEC
- CONTAINERS; CONTROL EQUIPMENT; EQUIPMENT; MATERIALS; MATERIALS HANDLING EQUIPMENT; MEASURING INSTRUMENTS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; WASTES
Optional Information
- Secondary number(s)
- JP patent application 9-153672