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

Inactive Publication Date: 2022-02-25
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 without carrier without affecting the safe and stable operation of the reactor and minimizing fuel loss. 99 The method for producing target parts, the method implementation steps are as follows:

[0021] Step 1: Confirmation of loading conditions

[0022] Step 1.1 Load without vector 99 Mo's application for target production has been 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 newly added targets;

[0025] Step 2: Determine the loading location

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

[0027] Step 2.2: Determine the initial loading position of the target according to the output demand of the reac...

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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 the heavy water reactor has been developed and utilized internationally, and an example for producing carrier-free <99>Mo by using the 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, putting a target piece into a pile; 4, carrying out in-pile irradiation; and 5, discharging the target piece from a 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 heavy water reactor production without carrier 99 Mo's method. Background technique [0002] 99 Mo is the most important medical radioisotope 99m The 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 in the world 99m Nearly 40 million person-times of Tc-labeled drugs have been used for nuclear medicine imaging diagnosis, accounting for about 70% of all clinically used radiopharmaceuticals. 99 Mo is mainly produced by irradiation in reactors, production using accelerators and production using neutron generators. Irradiation production on the reactor 99 Mo has neutron capture 98 Mo(n,γ) 99 Mo and fission 235 U(n,f) 99 There are two ways. The former contains a large amount of 98 Mo isotopes a...

Claims

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Application Information

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