HVL (half-value layer) definition
HVL (half-value layer) means the thickness of material that reduces the intensity of radiation to one-half of its original value.
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Half-value layer (HVL) means the thickness of specified material which attenuates the beam of radiation to an extent such that the exposure rate is reduced to one-half of its original value. In this definition the contribution of all scattered radiation, other than any which might be present initially in the beam concerned, is deemed to be excluded.
Certified scale weigh ticket means a weigh ticket that has been issued by a
Acceptable earned value management system means an earned value management system that generally complies with system criteria in paragraph (b) of this clause.
SPS AER Value means the Underlying Reference Value.
RI Value means, in respect of a Reference Item and a ST Valuation Date, (i) the RI Closing Value for such Reference Item in respect of such ST Valuation Date, divided by (ii) the relevant RI Initial Value (expressed as a percentage).