Automated In-Vessel Neutron Flux Detector System Embedded in Control Drum Assembly
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Neutron monitor device and neutron measurement method
US9733369B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9733369-B2 |
| Application number | US-201515317512-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2015 |
| Priority date | Jun 13, 2014 |
| Publication date | Aug 15, 2017 |
| Grant date | Aug 15, 2017 |
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Abstract
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Provided are a neutron monitor device and a neutron measurement method which make it easier to measure the intensity of the neutrons having the energy region of 10 KeV to several hundreds KeV. A neutron monitor device includes a first detector which includes a hemispherical first body formed of PE and having a radius of 31 mm, a first specimen containing GaN disposed at the center of the first body, a Cd layer provided on an outer surface of the first body, and a B layer provided inside the first body, and a second detector which includes a hemispherical second body formed of PE and having a radius of 27 mm, a second specimen containing GaN disposed at the center of the second body, a B layer provided on the outer surface of the second body, and a Cd layer provided inside the second body.
First claim
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The invention claimed is: 1. A neutron monitor device comprising: a first detector which includes a first body including a spherical portion of a predetermined radius formed of a hydrogen-containing material, a first specimen containing Ga disposed at the center of the spherical portion, a Cd layer provided on an outer surface of the spherical portion, and a B layer provided around the first specimen; and a second detector which includes a second body that is formed of a hydrogen-containing material and includes a spherical portion having a radius different from the radius of the spherical portion of the first detector, a second specimen containing Ga disposed at the center of the spherical portion, a B layer provided on the outer surface of the spherical portion, and a Cd layer provided around the second specimen. 2. The neutron monitor device according to claim 1 , wherein the hydrogen-containing material of the first detector and the second detector is made of PE, and the radius of the spherical portion of the first detector and the radius of the spherical portion of the second detector are set so that the peak sensitivity of each of the first detector and the second detector is shifted in the vicinity of a lower limit value of a desired sensitivity range. 3. A neutron measurement method comprising: placing the first detector and the second detector of the neutron monitor device according to claim 1 in an irradiation region of neutrons; and after the irradiation of neutrons, measuring the neutron intensity from a difference in sensitivity between the first detector and the second detector. 4. A neutron monitor device comprising: a first detector which includes a first body including a spherical portion of a predetermined radius formed of a hydrogen-containing material, a first specimen containing Ga disposed at the center of the spherical portion, and a B layer provided around the first specimen; and a second detector which includes a second body that is formed of a hydrogen-containing material and includes a spherical portion having a radius different from the radius of the spherical portion of the first detector, a second specimen containing Ga disposed at the center of the spherical portion, a B layer provided on the outer surface of the spherical portion, and a Cd layer provided around the second specimen. 5. The neutron monitor device according to claim 4 , wherein the hydrogen-containing material of the first detector and the second detector is made of PE, and the radius of the spherical portion of the first detector and the radius of the spherical portion of the second detector are set so that the peak sensitivity of each of the first detector and the second detector is shifted in the vicinity of a lower limit value of a desired sensitivity range. 6. A neutron monitor device comprising: a first detector which includes a first body including a spherical portion of a predetermined radius formed of a hydrogen-containing material, a first specimen containing Ga disposed at the center of the spherical portion, and a Cd layer or a B layer provided around the first specimen; and a second detector which includes a second body that is formed of a hydrogen-containing material and includes a spherical portion having a radius different from the radius of the spherical portion of the first detector, a second specimen containing Ga disposed at the center of the spherical portion, a B layer provided on the outer surface of the spherical portion, and a Cd layer or a B layer provided around the second specimen. 7. The neutron monitor device according to claim 6 , wherein the hydrogen-containing material of the first detector and the second detector is made of PE, and the radius of the spherical portion of the first detector and the radius of the spherical portion of the second detector are set so that the peak sensitivity of each of the first detector and the second detector is shifted in the vicinity of a lower limit value of a desired sensitivity range.
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- What does patent US9733369B2 cover?
- Provided are a neutron monitor device and a neutron measurement method which make it easier to measure the intensity of the neutrons having the energy region of 10 KeV to several hundreds KeV. A neutron monitor device includes a first detector which includes a hemispherical first body formed of PE and having a radius of 31 mm, a first specimen containing GaN disposed at the center of the first …
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Mechatronics Systems Ltd, Univ Osaka
- What technology area does this patent fall under?
- Primary CPC classification G01T3/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 15 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).