They did do extensive X-Ray scanning of the device. Additionally, they sandbagged the device before exploding it, so I would assume they re-constructed the dev

They did do extensive X-Ray scanning of the device. Additionally, they sandbagged the device before exploding it, so I would assume they re-constructed the device after the explosion. Given that the detonator was housed in a thick steel shell, there would be minimal heat damage due to the explosion.