Understanding Neutron Radiography Reading VII-NRHB Part 2 of 2

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3.2.3 Assessment for the Sensitivity Indicator (SI) The purpose of the sensitivity indicator is to determine the sensitivity of details visible on the neutron radiograph by evaluating the neutron radiographic image of the SI. Besides one shall visually inspect the image of the lead steps in the sensitivity indicator. If the 0,25 mm holes are not visible, the exposure contribution from gamma radiation is very high and further analysis should be made. The lead steps are shown on Fig. 3.3; under the steps a 0,25 mm thick acrylic shim D is located with four 0,25 mm holes. When examining the neutron radiographs of the SI, one shall visually inspect the image of the cast acrylic resin steps and note all the holes visible to the observer (consecutive holes marked as H). Then one shall take as the value of Η reported the largest consecutive value of Η that is visible in the image. The cast acrylic resin steps, shown on the left side of the SI (see Fig. 3.3) are separated by aluminium spacers with thickness (gap size) marked as G. During the visual examination of the neutron radiograph of the SI one shall report the G value. The value of G reported is the smallest gap which can be seen at all absorber thicknesses. Charlie Chong/ Fion Zhang
3.2.4 Assessment for the Calibration Fuel Pin (CFP- E1) From the neutron radiographs of the CFP-E1 the following dimensions ought to bedetermined (see Fig. 3.4) : Charlie Chong/ Fion Zhang
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Fion Zhang at Shanghai 21th July 20
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Charlie Chong/ Fion Zhang http://gr
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Quantum Mechanics Part 3 of 4 - The
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Neutron Radiography ■ https://www
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2. RECOMMENDED PRACTICE FOR THE NEU
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2.1 APPLICABLE DOCUMENTS a) Neutron
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2.3 EQUIPMENT 2.3.1 General 2.3.1.1
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Charlie Chong/ Fion Zhang
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2.3.3.2 For the neutron radiography
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Discussion Subject 1: 2.3.3.2 For t
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2.4 RADIOGRAPHIC TECHNIQUES 2.4.1 G
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2.4.2.3 When using overlapping radi
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Table 1.4 The Characteristics of So
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Image Converters ■ ■ ■ Indire
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2.4.4 Image Recorders 2.4.4.1 As th
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2.4.5 Cassettes 2.4.5.1 The cassett
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2.4.7 Geometry 2.4.7.1 The manner i
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2.4.8 Density of the Radiograph 2.4
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2.4.10 Image Quality Indicators (IQ
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2.4.11.2 This should record the fol
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2.4.12.3 When track etch materials
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2.5 MEASUREMENT 2.5.1 Definition an
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Fuel Pins Charlie Chong/ Fion Zhang
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2.5.3 The Neutron Radiographic Tech
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2.5.5 Making the Measurements 2.5.5
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Table 1.4 The Characteristics of So
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2.5.5.7 Image recorders to be used
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2.5.5.10 Cassettes of the vacuum ty
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2.5.6 Image Enhancement 2.5.6.1 Ele
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2.7 FILM HANDLING 2.7.1 Storage of
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2.8 FILM PROCESSING 2.8.1 General T
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2.8.3.4 Development Normal developm
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2.8.3.8 Fixer Neutralising (?) The
Page 81 and 82: 2.8.3.14 Drying Drying is a functio
Page 83 and 84: Manual Processing ■ https://www.y
Page 85 and 86: 2.10 REFERENCE RADIOGRAPHS Part 4 o
Page 87 and 88: 2.12 RECORDS AND REPORTS 2.12.1 Rec
Page 89 and 90: 3. NRWG INDICATORS FOR TESTING OF B
Page 91 and 92: Those indicators, fabricated at Ris
Page 93 and 94: Fig. 3.1 The ASTM Beam Purity Indic
Page 95 and 96: Picture and drawing of Beam Purity
Page 97 and 98: Charlie Chong/ Fion Zhang Standard
Page 99 and 100: DL Film densities measured through
Page 101 and 102: BPI Radiograph Charlie Chong/ Fion
Page 103 and 104: The body of the BPI is made of a 8
Page 105 and 106: The body of the BPI-F consists of a
Page 107 and 108: Charlie Chong/ Fion Zhang
Page 109 and 110: 3.1.3 Sensitivity Indicator (SI) In
Page 111 and 112: The calibration fuel pin CFP-E1 (Fi
Page 113 and 114: Charlie Chong/ Fion Zhang Fig. 3.3
Page 115 and 116: Charlie Chong/ Fion Zhang BPI & AST
Page 117 and 118: Correct placement of Indicators in
Page 119 and 120: 3.2 ASSESSMENT OF TEST RESULTS FOR
Page 121 and 122: From those values the neutron expos
Page 123 and 124: From those values the neutron expos
Page 125 and 126: BPI Radiograph Charlie Chong/ Fion
Page 127 and 128: Pair Production Charlie Chong/ Fion
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Page 131: From those values, exposure contrib
Page 135 and 136: Radial dimensions • Pellet diamet
Page 137 and 138: 4. ATLAS (COMPACT VERSION) OF DEFEC
Page 139 and 140: It contains a collection of typical
Page 141 and 142: Those components are marked with ca
Page 143 and 144: Fig. 4.1 Components of a typical nu
Page 145 and 146: 4.2.3 Defect Location On Fig. 4.2 t
Page 147 and 148: 4.2.4 Defect Nature and Origin Defe
Page 149 and 150: 4.2.8 Measuring of Dimensions Besid
Page 151 and 152: 4.3.2 The Use of the Collection in
Page 153 and 154: Insert Page 137~149 Charlie Chong/
Page 155 and 156: 124 A.a.5 Corner chips A.a.6 Other
Page 157 and 158: 126 A.b Defects in pellet-to-pellet
Page 159 and 160: 128 A.d Central void Central void c
Page 161 and 162: 130 B.a Hydrides in cladding Hydrid
Page 163 and 164: 132 C.b Defects of spring sleeve Fi
Page 165 and 166: 134 D. Defects in end plugs Fig. 4.
Page 167 and 168: Defects not shown in the present Co
Page 169 and 170: Table 5.1 Neutron Radiography Insta
Page 171 and 172: Table 5.1 Contd. Site Facility Came
Page 173 and 174: Table 5.2 Contd. I S1te Facility Co
Page 175 and 176: Table 5.3 Site Contd. Facility Karl
Page 177 and 178: 145 -y, n SHIELDING a. SHIELDING AS
Page 179 and 180: 0 I 10 I 147 WlJJm • m g Alumini
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neutron source cassette image recor
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155 PNEUMATIC OPERA TI N BEAM C G S
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DIDO REACTOR SHELL WALL REACTOR SHI
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5 8 020 --r REACTOR RE _liUL CO 12
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161 e CHANNEL WllH FUEL f)·r-: ;.t
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t POOL WATER J I I .. ·l i I FLANG
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165 OBJECT TA BLE TOP-SHIELDING REA
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-- - 1 Removable precollimation 2 I
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169 _-, . II II I I ___ r-----J 1 .
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Nuclear fuel pellets made of proces
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Peach - 我爱桃子 Charlie Cho
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Good Luck Charlie Chong/ Fion Zhang
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Understanding Neutron Radiography Reading VII-NRHB Part 2 of 2

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