ae ES TT mR ee, poten , ~ . greg PT Re ESTEEPEEhlhoEE PLR Ty pelt, Mage Bo edn) ,TOP SECRET ~ RESTRICTED DATA ee he ng lea? REPORT OF THE NSC AD HOC WORKING GROUP ON THE TECHNICAL FEASIBILITY OF A CESSATION OF NUCLEAR TESTING fo o SUMMARY a “p “\ + = 3 eeeennenen ee ee ee dd nes euncaetne ee ee ee ee enteaeeeennoesn eeu men ee eee sean 1.* ee ee eeoenae eee enon ee eee * ee Po oe . . see epee eee eee enne eee eensenenaen ee ne ne ee ee eee nese enn steers nenee rer * ern enneere een eee neeen ee Hoe aerate ereaes eee eee ane eeWeanesn ee eehenenean ess ov ee soe * een ee eee oe eee he he see eee ee paneer ee peewee enore se eee pep eneeonae oeen werner nereene sunanee ee ee Pe en eeeeenaen nee see tee ener neee eve eee ne ees * ee ee eases Se eee ee eee eset eeeecen eoenens Pe ee eee nae ‘ . ease eeceae eee eneenanne eavannenas ee eeaen ren esse ee ween eee esueen ean Pe erase enees ease wmewee renee ee ee enee en eee anane * ee ee eave uenneve ee see een esnere ee ee ee eamene ee ee seeece ep eon een * ee a ene eee eee eer eens ee een ean beret eee nem etee tee eenewme . cee sr ees eee cone ee een oe meme eone eee mr sue eennenes ee eee nere eee ee ewe eenene ee) Pe ee ee enon ane Pe ee he one ee eee eee ee ee ee he hh ee ee - eee ee ee et ee ee eee eeaeaeneeneeeene sonnet @enpoeuvetnenneee RO wm ETS sort BR 2.-A practical detection systemcan be designed which can detect ee ee and identify nuclear explosions in the USSR and Chinaexcept for some underground tests of small sizes iiiii.iii..: ‘| Such a system, adequate for saleguarding a nucleartestlimitation agreement, would requirel/: a. the installation of about 70 observation stations in explosions in the remote areas of the world. Sucha system is des~ cribed in Appendix A and its capabilities are discussed in Section B of the Conclusions. With such a system agreed to and implemented, the Workin eels thatthe USSR could pat utilize testing to : improve significantly its nuclear weapon capability, except for small yields without running a great risk of beingdetected. i/ The separate views of the CIA member appears in Section B 6 of the Conclusions. i} at. royhl sed capability of the existing Long Range Detection Systemfortest A, An additional system of about: :: jstations and extensive air sampling coverage of the entire world would greatlyimprove the detection 1 eetone ee ~~ on certain occasions, : grees ~ pene Lense eres c. rights to overfly partsoftheSovietUnion and China memes SO, +. Seae . ey a clandestine underground test; and Bee erent, AR wee. ep Te a aea a b. the right of immediate access of mobileteamsto any areas Suspected of having been the location of od gta, the territories of the USSR and China;