Operation Sandstone
Operations

Operation Sandstone

Section Title: Operations
Table Section Text: None

Name	Date time (UT)	Local time zone	Location	Elevation + height	Delivery, Purpose	Device	Yield	Fallout	References	Notes

X-ray	April 14, 1948 18:16:59.0	MHT (11 hrs)	Enjebi (Janet), Enewetak Atoll 11°39′46″N 162°14′16″E / 11.66276°N 162.23785°E	1 m (3 ft 3 in) + 61 m (200 ft)	tower, weapons development	Mk-3, Type B levitated	37 kt	I-131 venting detected, 140 kCi (5,200 TBq)	2:1 oralloy-plutonium, levitated core. 2.38 kg (5.2 lb) Pu + 4.77 kg (10.5 lb) oralloy yielded 37 kt at 21% efficiency.

Yoke	April 30, 1948 18:08:59.0	MHT (11 hrs)	Aomon (Sally), Enewetak Atoll 11°36′56″N 162°19′10″E / 11.61569°N 162.3194°E	1 m (3 ft 3 in) + 61 m (200 ft)	tower, weapons development	Mk-3, Type B levitated	49 kt	I-131 venting detected, 1.3 MCi (48 PBq)	Oralloy core 2.5 kg (5.5 lb) Pu, 5 kg (11 lb) U235. (Hanson says it probably was pure U-235), levitated core.

Zebra	May 14, 1948 18:04:00.0	MHT (11 hrs)	Runit (Yvonne), Enewetak Atoll 11°32′07″N 162°21′38″E / 11.5352°N 162.36063°E	1 m (3 ft 3 in) + 61 m (200 ft)	tower, weapons development	Mk-3, Type B levitated	18 kt	I-131 venting detected, 100 kCi (3,700 TBq)	Considered so optimal that it was put into immediate production for Mark 4.

Sentence(s)

The Yoke device used a levitated pure uranium 235 core.

final_sentence: The Yoke device used a levitated pure uranium 235 core.