purplecat: Hand Drawn picture of a Toy Cat (Default)
I've been slowing working my way through accrued memorabilia from my parents' home. My father worked in radiation dosimetry and that is apparently him on the first page of a leaflet below, modelling a natty belt and badge loaded with radiation detectors.


First page of Nuclear Accident Dosimetry leaflet issued by Harwell Scientific Services.  Showing a photo of a Man in white overalls with a black belt with circular devices stuck to it and a plastic badge clipped where a breast pocket would be with another device.  Text: Despite elaborate physical and administrative controls in the United Kingdom aimed at preventing criticality accidents, the possible occurrence of such an accident cannot be entirely disregarded, and the necessary procedures and facilities for dealing with it must be provided.  Among the more important of these is some method for obtaining a rapid assessment of the dose to personnel following a criticality accident.  This assessment would be used for the guidance of the medical services in appropriate treatment.  A rapid does assessment is also desirable in order to maintain good public and employee relations, and for the reassurance of those personnel who have been only lightly exposed. Written on the leaflet in pencil is John's neutron dosimeter.  Harwell info.  Photo of John.


The remaining two pages of the leaflet go on to document the working of the system.
purplecat: Hand Drawn picture of a Toy Cat (Default)
Last week, while investigating the contents of an old ammunition box at my parents for share certificates, I found the following:


Miscellaneous almost square plastic cases about 5-10mm thick.  Several are in wrappers of various sorts. Two are black and have what would these days be a long LED display in them but it looks like something else here (with dots on it), a black semi-spherical  bulge and a second circular hole next to the bulge - again with grey material behind.  Two are blue and a bit chunkier.  One as an orange circle attached to hang from it on a plastic ribbon - the other obviously did once as well but the orange circle is not detached and two one side.  These blue things have four rectangular moulded indentations in them.  Finally there is a grey square with a single rectangular space.  They all look like they are little cases that could be opened - some kind of strip put inside and then closed (it is possibly the contents that are still in the wrappers.  A few safety pins can be seen for attaching the cases to one's closing.  Behind them is a postcard in mostly illegible writing
The postcard reads (in my father's handwriting) "Personal Radiation Dosemeters either designed by John Dennis or in whose design he was involved".

A black velvet presentation box that is open.  It has a white satin lining and a black velvet pad to which is fixed a gold broach with three pearls on a long gold spike.  The middle pearl is slightly larger than the two either side of it.  Behind this is second smaller pin with a triangular badge with a three spoked design in gold against a black background, the spokes are wavy and go to the centre of each side of the triangle, meeting in the middle.  There is a small card in mostly illegible writing in the lid of the box.
The card reads (again in my father's handwriting) "Centre pearl has been irradiated in a nuclear reactor. Given to John Dennis when visiting Japan 1952."


I don't know why I didn't photograph it, but there was also a medal in the box with a boxer on it. Dad's card with that noted that it had been presented to him for boxing. Underneath he had written "John lost both the fight and his front tooth". Weirdly it had never before occurred to me to wonder why my father was missing a front tooth.

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purplecat: Hand Drawn picture of a Toy Cat (Default)
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