These customers used a heavily shielded GR1 to measure the Radioactivity levels in a building at the Fukushima Daiichi power station
With a heavily shielded GR1 gamma spectrometer, these customers measured photon energy spectra at the Fukushima Daiichi Nuclear power station. Completely self-contained, the GR1 was able to continuously collect spectral data from a fixed position above the operating floor of the Unit 3 reactor, producing spectra fundamental for evaluating the dose reduction effect.
These customers used a heavily shielded GR1 to measure the radioactivity levels in a building at the Fukushima Daiichi Power station.
The Kromek GR1 is a range of CZT-based high-performance Gamma Ray wSpectrometers. They are completely self-contained, with a built-in preamplifier, shaping amplifier, baseline restorer, pulse height digitizer, and HV supply. The digitized pulse heights of detected gamma-ray signals are sent to a PC via the USB. The unit is powered entirely from the USB bus, so no external power supply is needed.
Photon energy spectra were measured above the operating floor of unit 3 reactor at the Fukushima Daiichi Nuclear Power Station by using a Kromek GR1 CZT (CdZnTe) Gamma Ray Spectrometer. The GR1 Spectrometer was installed in a lead collimator to measure the photons from the area directly below the detector. The collimator and spectrometer were lifted up by a crane and set above the operating floor. The photon spectra were derived by unfolding the pulse height spectra measured using the spectrometer. The response function of the spectrometer was calculated with the MCNP-4C code and was used as an input parameter of the unfolding code MAXED. It was found from the photon energy spectra that low-energy photons with energy below 0.4 MeV were dominant above the operating floor. These spectra are fundamental data for evaluating the dose reduction effect by setting up shields on the operating floor.
TANIMURA, Yoshihiko & Hirayama, Hideo & KONDO, Kenjiro & NAGATA, Hiroshi & IWANAGA, Kouhei & SUZUKI, Seishirou. (2016). Photon Spectra Measured above Operating Floor of Unit 3 Reactor at Fukushima Daiichi Nuclear Power Station. Transactions of the Atomic Energy Society of Japan. 15. 10.3327/taesj.J16.001.
Find out prices and full specification for the GR1
Take a look at our brochures to find the specifications and additional information about any of our products.
Let’s find the solution that meets your needs and budget.
Your source for everything that is going on in Kromek’s world and the industries we work in, delivered right to your inbox.
To gain access to Kromek downloads please enter your email below – shortly after you will receive a verification email. Click the link and Kromek downloads will be unlocked in your browser.
Due to the nature of products we need to ensure that our users are finding the correct information for their needs. By providing your details, you are granting us permission to follow up via email to discuss your needs