2013年2月5日

セシウムの吸入摂取

ICRP PUBLICATION 71 と ICRP Supporting Guidance 3 からの抜粋
8

ICRP PUBLICATION 71
Age-dependent Doses to Members of the Public from Intake of Radionuclides: Part 4 Inhalation Dose Coefficients

Seiichi Ushikubo @sushikubo

ICRP 71 Table 5.20.2(a) Inhalation Dose Coefficients: Cs-134 1μm, Type F http://t.co/Q2pnuy4m

2013-02-05 18:52:13
拡大
Seiichi Ushikubo @sushikubo

ICRP 71 Table 5.20.2(b) Inhalation Dose Coefficients: Cs-134 1μm, Type M http://t.co/QUFgAnyN

2013-02-05 18:53:18
拡大

Cs-134: Particulate Aerosol: AMAD = 1 μm の条件で
5 Years を比べると
<Absorption Type F>
Respiratory tract: ET Airways: 2.7E-08, Lung: 4.1E-09
Effective Dose: 5.2E-09
<Absorption Type M>
Respiratory tract: ET Airways: 3.7E-08, Lung: 9.7E-08
Effective Dose: 1.6E-08

(吸収のタイプが変わると、実効線量も肺の等価線量も変化する)

Seiichi Ushikubo @sushikubo

ICRP 71 (201): "Studies of caesium associated with irradiated fuel fragments, including particles released from the Chernobyl accident, .."

2013-02-05 18:43:44
Seiichi Ushikubo @sushikubo

ICRP 71 (201) ".. indicate that much of the caesium is rapidly absorbed (within days), "

2013-02-05 18:44:42
Seiichi Ushikubo @sushikubo

ICRP 71 (201) ".. but a fraction may be retained with the particle matrix and absorbed over a period of months."

2013-02-05 18:45:17
Seiichi Ushikubo @sushikubo

ICRP71 (201) "In two in vitro studies the behaviour of the caesium present in irradiated fuel fragments was consistent with assignment to M"

2013-02-05 18:49:49

(大部分は急速に吸収されるが、一部は吸収されるのに数か月かかる。F とするデータもあれば M とするデータもある)

ICRP Supporting Guidance 3
Guide for the Practical Application of the ICRP Human Respiratory Tract Model

(粒子の大きさにより吸収経路が異なる)
肺に沈着して吸収されるか、肺から掃き出されて消化管へ廻って吸収されるか

Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: 4.4. Effects of aerosol parameter values on dose assessments Fig. 4.4. & Fig.4.5. http://t.co/wAd21RP5

2013-02-05 17:41:32
拡大
Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: 3.4. Effects of respiratory parameter values on dose assessments: Table 3.2 http://t.co/8AMUCX3G

2013-02-05 17:37:35
拡大

(コンバートメントモデル)

Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: C.3. Particle transport: Fig. C1. Compartment model .. http://t.co/7tB6cXFL

2013-02-05 16:23:17
拡大

(吸収)

Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: C.4. Absorption: Fig. C2. Alternative compartment models http://t.co/LxzCqc36

2013-02-05 16:37:58
拡大

(吸収のタイプによる差)

Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: 5.2.2. Absorption: Table 5.1. http://t.co/Yvfwmwmh

2013-02-05 17:49:46
拡大
Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: C.5. Criteria for assigning compounds to the default absorption Types: Fig. C5. http://t.co/3Z717ivW

2013-02-05 17:08:17
拡大
Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: C.5. Criteria for assigning compounds to the default absorption Types: Fig. C6 http://t.co/fI2Qc5yO

2013-02-05 17:08:49
拡大
Seiichi Ushikubo @sushikubo

セシウム吸入時のパラメータ:すべての化合物に対して、lung clearance types: Fを主, f1: 1 で考える。ICRP Supporting Guidance 3, 2000 より http://t.co/pUHC9iiw 土壌と吸着した場合も当てはまるのかな。

2012-07-16 02:33:43
拡大

(吸収のタイプによる排泄の差)

Seiichi Ushikubo @sushikubo

ICRP Supporting Guidance 3: E.4.4. Implications for dose assessments: Fig. E4.6 http://t.co/xtwevNLN

2013-02-05 17:20:06
拡大
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