Re-assessment of PADC neutron dosemeter results

In an operational neutron personal dosimetry service there is often a requirement for re-assessment of measured doses. The requirement may arise for routine confirmation of high doses, for checking a result at the request of a customer, or where there has been an error in primary processing. Three methods of re-assessment are under consideration for use in NRPB's PADC neutron personal dosimetry service: electrochemical etching of the opposite face of the PADC element; secondary chemical etching of the element; and a second electrochemical etch following a cleaning etch. Advantages and disadvantages of each method are discussed.