Speaker
Mr
AVINASH JOSHI
(ALPHA PNEUMATICS)
Description
ABSTRACT
QUALITY ASSURANCE OF LARGE AREA RPC DETECTOR:TECHNIQUES FOR MEASUREMENT OF GAS LEAK RATE
AVINASH V. JOSHI(a), N.K.MONDAL(b), B.SATYANARAYANA(b), S.D.KALMANI(b),P.VERMA(b)
a Alpha Pneumatics ,Unit No. 24 , Digvijay Ind. Estate 1, Upvan , Thane 400602 (INDIA)
b DHEP,Tata Institute of Fundamental Research, Homi Bhabha Road , Colaba , Mumbai 400005 (INDIA)
Hazardous Gas leaks from operational RPC detector body cause pollution , increase operational cost and degrade detector performance. Working of close loop system ,commonly used for detector stacks , is severely affected by gas leakages . Factors such as Fabrication defects, radiation embrittlement of plastics, gas flow rate , differential pressure , drift and diffusion coefficients of gases are related to leak rate and effects . Ingress of contamination into through a leak can occur under strong concentration gradient . The problems are further compounded with formation of radicals - a threat to quality and life of detectors .
There is a distinct change in localized gas concentration near a leak ,especially at low velocities. Leak detection techniques such as Pressure decay, Tracer techniques, acoustic technique and mass spectroscopy are studied for quantitative estimate of leak rate. Liquid free IN-SITU leak test for working RPC is described. Design and Construction of equipment required to conduct leak tests is detailed. International standards for gas leak rates equivalent to BS EN 13192:2002 are discussed . Acceptable range of Leak rate for working RPC- with and without close loop recirculation system, is estimated .
Implementation of Leak test procedures into a Quality Assurance Plan for RPC Fabrication Process is considered.
_____________________________
Primary author
Mr
AVINASH JOSHI
(ALPHA PNEUMATICS)
Co-authors
Prof.
NABA MONDAL
(DHEP,TIFR, MUMBAI (INDIA))
Mr
PIYUSH VERMA
(DHEP , TIFR, MUMBAI, (INDIA))
Dr
SATYANARAYANA BHISETTE
(DHEP , TIFR , MUMBAI (INDIA))
Mr
SURESH KALMANI
(DHEP , TIFR , MUMBAI (MUMBAI))
