Yusliwor f . . \: Lyk > . Pu, a =, RES ode 7, 4 4 fr oe a quar ve and personnel decontamination operations at Kwajalein, cloud tracking operations until H plus 103 hours, instrument maintenance and recalibration operations, preparation of medicai dosimetric records and campilation of mission reports. Each monitor completed an average of two training flights with his assigned crew prior to Peter X-ray Day, The flights were extremely valuable in that each monitor was able to work out radiological safety procedures that, while adequate, would not hamper the primary mission. So t sé, . 4 ” had a definite effect on ion chamber type instruments. In general all ion chamber instruments, except the Beckman LX-6 Gamma Survey Meter which had a sealed case, failed due to rupture of the ion chamber, This problen was solved by modification of the instruments to include an air hole in the chamber and by calibration of the instrument at the altitude for which it was to be used. Capt. Matthews designed and supervised construction of an experimental instrument pressure tank which operated off the radar presTests shoved this tank to be excellent and instrwaents could be used in it without air calibration. A personnel decontamination center was constructed at Kwajalein and + . oNue mainly from its lack of clerical personnel and inadequate equipment, except <— ty ~ ~ 9i ye eet ele Initial practice missions showed that altitudes of 10,000! or higher Probleas which hampered Task Unit 7.6.1 during this phase stexed qi ‘ ~, ~A! \ Z cedures. placed in operation prior to X-ray Day, n «,i . de *& ~~ these data considerable changes became necessary in instrumentation pro- suriging systen of a B~l7 aircraft. $f + aoe % 7k atid v4 atv rene 7 Aweloy Sb oeptmn e ae ‘:“NB Rte dt Instrument performance data besan to be accumulated and as a result of ~ 6s - .