Document 3Na3y0OEy3XYwVE5e6jxBbGp6

ABD00312956 BASIS OF ESTIMATION OF EMISSION FROM D-7U1 RELIEF VALVE ON OCTOBER 16, 1978 1. B. Hawkins observed emission for 3 minutes. 2. Relief Pressure Start: End: Average: 170 psig l6U psig l6T psig 3. Relief Valve Design 100,000 lb./hr. at 175 psig and M.W. of 62.5 100,000 2^ x 1mole x SCF hr. 62.5 lb. lb. mole =5^^400 21 hr. 57^,1*00 21 x -1 = 28,720 SCF hr. 60 k. Pressure Correction of 167 versus 175 psig 28,720 x 2 ^ 27,500 SCF 190 5. Assume relief was 50$ VCM and 50$ H2O. 6. Amount of V.CM = 0.5 x 27,500 = 13,750 SCF 7. Weight of VCM 13750 359 62.5 2395 lbs. of VCM 2U00 lbs. of VCM A