Tes ofRadio} optical Jostroments. (UNCLASSIFIED) An agreement with = a sting of radiation detection and measurenent inatrunents ani their cosponentparts has bean in operation since March 195i. Since that time 10 types of various radiation detection devices have been tested, These tests include experiments such as: calibration (including alpha, beta, gamma, and neutron), spectral dependency, temperature, humidity, ahock, and vibration effects. itiated when required, Other reisvent tests are also in- The instrummrts exasined to date include fabricated in Comiasion installations, new nich are mitted by to detect ‘tions are appearing on cial types parchesed by the Comission fom test purposes, andinstrumeats subprivate concerns or individuals exploring new and improved methods and measure radiation.“arveatig Ceesgied stumturdeani disoumesd made in the light of currently scospted standards and discussed with the originating groups. ‘The results af each test are also presented in the National Bureau of Standards Testing Report. Through the Radiation Instrument Branch, highlights of specific izsportant resulte are described in of AEC and its contractora, and other goverment agencies. Examples of test- ing activities during June are as follows: a) Parker Pen Company Fila Dogimeter - In cooperation with the Office of Industrial Devalopuent a test was arranged of a suall “locket sised® self-developing film dosimeter to cover spectral sensitivity, calibration and sensitivity dependance on develop~ er temperature at NES for Parker Company; b) Seintiliation Counter Survey Meters - All presently available types of scintillation counter survey motors are being tested in order to determine electrical aud radiation characteristics as well as mechanical and climatic testa to evaluate the merits of each instrousent under simlated field conditions, The results are primarily of interest te the decphysical Section of Raw Materials Division. Givil Defensa Activities 1953, in rnd p sck Cantral Massachusetts. It eax- tended from Petershax to Wrentham moving along a path af about 60 wiles viuich - varLed in width from several hundred yards to ovex a half mile. Most of the “ distance covered was over unoccupied land except for a mumber of isolated houses which if grouped together would have made a sisesble comamity, The towns of Holden, Shrewsbury, and Wrentham were in the path of tha tornado and at about md-length it passed over the northern part of Worcester. Because of the possible similarity to bomb damage, Professor H, lL. Bowman, Consultant to the Division, was requested to examine the area involved. Destruction in the area did not look wilike a bemb-damaged area, however the appearance was more like a high-explosive bombing incident than atomic due to ‘ lack of fire. The damaged dwelling units numbered about 000, destroyed _ DOSARCHIVES