Testing a device with an amount of fissile material insufficient for sustaining a critical chain reaction (sub-critical testing): A sub-critical test supplies data relevant to how a small amount of fissile material will react to an explosive detonation.This enables weapons designers to determine the reliability of the device’s firing mechanism and to gather other data, but does not generate any nuclear yield since no fission takes place. Testing a device with surrogate, non-fissile, materials (hydrodynamic testing): States can replace the highly enriched uranium or plutonium found in a device’s core with a non-fissile material that shares similar physical properties, and detonate the device to test the explosive assembly.States that conducted nuclear tests in the past have the additional advantage of being able to assess and calibrate their computational codes using actual test data. Supercomputer simulations: Powerful, specialized computers (“supercomputers”) can perform simulations of the physics of initiating nuclear explosions.They can also be applied to help assess the reliability of existing nuclear weapons as they age. These techniques can aid in the development of new nuclear weapons designs. States utilize theoretical models and physical experiments to model and replicate specific processes involved in a nuclear weapons test. How do states simulate nuclear test conditions without conducting nuclear tests? Countries have confidence in their ability to maintain their existing nuclear weapons arsenals through “stockpile stewardship” programs without the need for nuclear tests.
![define stockpile stewardship and its purpose. define stockpile stewardship and its purpose.](https://present5.com/presentation/6b59495f6cd398f7ee6ce32f6ae8f385/image-48.jpg)
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While each country had its own reasons for instituting an initial moratorium, countries continue to forgo nuclear testing because: Note: Israel never declared a testing moratorium because it is not known to have tested, and does not officially admit to possessing nuclear weapons.