Method for producing carrier-free < 99 > Mo by using heavy water reactor

A carrierless, heavy water reactor technology, applied in the field of nuclear radiation, to achieve the effect of reducing fuel loss

Pending Publication Date: 2022-06-17
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

current global 99 Mo is mainly uncarrier produced by fission in research reactors 99 Mo, the world has been developing and utilizing heavy water reactors to produce carrier 99 Mo, no commercial heavy water reactor has been used to produce carrier-free 99 Examples of Mo

Method used

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  • Method for producing carrier-free &lt; 99 &gt; Mo by using heavy water reactor
  • Method for producing carrier-free &lt; 99 &gt; Mo by using heavy water reactor
  • Method for producing carrier-free &lt; 99 &gt; Mo by using heavy water reactor

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Embodiment Construction

[0020] This patent provides a method for loading and unloading uncarriers without affecting the safe and stable operation of the reactor and minimizing fuel loss. 99 The method for producing Mo target, the method implementation steps are as follows:

[0021] Step 1: Confirmation of loading conditions

[0022] Step 1.1 Loading without vector 99 Mo's application for the production of targets was approved by the nuclear safety regulatory authority;

[0023] Step 1.2 The reactor loading and unloading system has the function of pushing back new fuel from the downstream, and has passed engineering verification;

[0024] Step 1.3 The core tracking calculation program has the ability to track and calculate new targets;

[0025] Step 2: Determine the loading position

[0026] Step 2.1: Determine the next batch according to market demand 99 Mo heap output;

[0027] Step 2.2: Determine the initial loading position of the target according to the output requirements of the reactor an...

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Abstract

The invention belongs to the field of nuclear radiation, and particularly relates to a method for producing carrier-free < 99 > Mo by a heavy water reactor. At present, global < 99 > Mo is mainly carrier-free < 99 > Mo produced by a research reactor through fission, production of carrier < 99 > Mo by using a heavy water reactor has been developed and utilized internationally, and an example for producing carrier-free < 99 > Mo by using a commercial heavy water reactor has not been seen up to now. By means of the method, large-scale stable production and supply of < 99 > Mo are achieved through the heavy water reactor, and the produced < 99 > Mo is mainly applied to the field of nuclear medicine diagnosis. The method comprises the following steps: 1, confirming loading conditions; 2, determining a loading position; 3, the target piece is put into a pile; step 4, carrying out in-pile irradiation; and 5, discharging the target from the reactor core. On the premise that safe operation of the reactor is not affected and fuel loss is reduced as much as possible, the carrier-free < 99 > Mo is produced through irradiation of the heavy water reactor, and the requirement of the nuclear medicine field for < 99 > Mo is met.

Description

technical field [0001] This patent belongs to the field of nuclear radiation, and specifically relates to a carrier-free production of heavy water reactors 99 Mo's method. Background technique [0002] 99 Mo is the most important medical radioisotope 99m Parent nuclide of Tc. 99m Tc has a short half-life (6.02h) and suitable ray energy (140keV), which is very suitable for single photon emission tomography (SPECT), and can label various ligand drugs. It is used every year around the world. 99m Nearly 40 million people were diagnosed by nuclear medicine imaging with Tc-labeled drugs, accounting for about 70% of all clinically used radiopharmaceuticals. 99 Mo is mainly produced by reactor irradiation, by means of accelerators, and by means of neutron generators. Irradiation production on reactors 99 Mo has neutron capture 98 Mo(n,γ) 99 Mo and fission 235 U(n,f) 99 Mo two ways. The former contains a large amount of 98 Mo isotope, so called carrier 99 Mo, which conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G1/02
CPCG21G1/02G21G2001/0036
Inventor 邹正宇尚宪和樊申刘大银孟智良黄艳李世生吴天垣刘小年徐军张国利
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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