Efficiency

Reviews of a ir emi ss ion con t rol systems have been conducted at s elec t ed facilitie s s u ppor t ed by t he Depar t men t of Energy (D OZ ) Of fi ce of Nucle a r Energy (NE). L a rge high ef fi ciency pa rt icul at e air (HEPA) fi l t r at ion sy st em s and t heir t e st ing received par t icular empha s is. Al th ough signi fi can t difference s be t ween th e si t e s were found, t here were al s o several common issues. The s e are di s cus s ed under four general t opic areas : policy developmen t , t es t ing mul t iple s t age sys t ems, guid a nce on in- p lace fil t er t es t ing and s y s t em supervision, a nd uncer t ain t y in in-pl a ce fil t er t es t ing resul t s. Two p ri n c ipal concl u sions have emerged fro m th e s e reviews. Firs t , t here is an immedia t e need t o develop information on how fil t er mechanic a l in t egri ty decre a se s wi th t ime and use t his t o establish limi t s on fil t er service life. S econd, t here is a gener a l need t o en s ure th e validi t y of in-pl a ce fi l t er t es t ing resul t s and im p rove t es t ing prac t i c es. A m a th ema t ical framework for describing t he effec t s of nonide a l sys t em fea t ures on t es t ing re s ul t s is proposed a s an a id in unders ta nding th e uncer t ai nty in in-pl a ce fil t er tes t ing resul