1、1H1H2X屏蔽計算資料：一、X射線探傷機(jī)房4.4屏蔽設(shè)計的核實(shí)與評價4.4.1評價方法4.4.1.1屏蔽評價原則（1）根據(jù)國家標(biāo)準(zhǔn)規(guī)定，對源的設(shè)計、建造和運(yùn)行中留有的安全裕量，以確保可靠的正常運(yùn)行。2X的能量，按原初輻射能量計算；對散射X射線，四周墻體（包9090X（3）同一屏蔽體按泄漏輻射和散射輻射分別計算屏蔽厚度兩者的厚度相差不到一個1/10值衰減層厚度時，則在其中較厚個厚度上再加一個半值層厚度。4.4.1.2輻射屏蔽的計算方法1XBpTOC o 1-5 h zH口d2,B=1BpWUTUUBpmSvm*mmA-imin-i；HmSvwk-i；dmWmAminwk-iUTB-logB1/

2、10(TVT)ppNtvtX1/10XTOC o 1-5 h zXBsBs=H(d1d2)2/(WAT)BsmSvmA-imin-i；HmSvwk-i；d1md2m900.07%Am2;WTH1Bs1/10(TVT)NTVT3X1/10(TVT)N=logTVT10HnNtvt1/10WL射線探傷機(jī)5mGy/h。dHUTd2（3）層個數(shù)；1mmSvwk-1X的1m處的泄漏空氣比釋動能率為wnttum(1)。1/10TVT4.4.2工程防4.4.2.1X410-2mSvwk-i410-3mSvwk-iTOC o 1-5 h zX225kV3mA101800mAminweek-iUU=1U=1TT

3、=1T=1/164-1X1/10TVT225kV對于防護(hù)門、防護(hù)墻、天花板無原初輻射，只有散射與泄射輻射，225kVX900160kV225kVX1/10TVT2.2mm160kVX1/10TVT1.1mm41XmSvweekTU(m)NTVT(mmPb)(mm)30cmSv/h410-31/1612.402.134.7100.20410-2111.504.309.5140.007410-2112.502.305.1100.18410-31/1610.803.096.8101.18410-31/1610.962.936.5100.90410-31/2011.502.455.4100.444-1

4、30cm2聞Gy/h4.4.2.24.3.4.1X1XKyXTZW口叩UK=xHDd2KXXHmSvweek-1dmWmAminm2week-1UT2XXKs21m;，m;vWDTDUDaDAK=sHDd2Dd212KSSd1d2400cm22022N=logTVT1020WDTOU_UHDd2m21/1022NTVTWLd1/101m201/104.3.4.2CTCTmSvweek-i;U=0.5T=i10-2mSvweek-i10-3mSvweek-i5000mAmimweek-ii40kV0.3%U=0.25U=iT=0.252)CTCT4-74-64-6CTmSvweek-iTU(m)

5、K(mm)(mm)410-30.250.253.526.305103200200+10410-210.253.802.164102200200+10410-30.250.253.526.305103200200+10410-30.250.253.805.410103200200+10410-30.2514.302.163102180175410-2114.02.1631023mmPbX410-30.2515.102103mmPb4-7CTmSvweek-1TU(m)K(mm)(mm)410-210.253.762.210102200200+10410-310.252.602.164103200

6、200+10410-30.250.253.765.526103200200+10410-30.250.252.601.156104200200+10410-30.2514.301.690104180170410-2114.002.1631023mmPbX410-30.2514.205.102103mmPbX410-30.2512.605.102103mmPbX410-30.2512.605.102103mmPb4.3.4.3DR(1)DRH410-2mSvweek-i410-3mSvweek-iW1000mAmin-week-iE125kV700cm20.24%UU=iU=0.25U=iTT=

7、iT=0.252DR以上評價參數(shù)和評價公式(20)-(22)，計算出的所需表4-8。4-8DRmSvweekiTU(m)K(mm)(mm)410-30.250.253.761.105103200200410-310.252.609.246103200150410-210.253.764.421102200160410-30.250.252.602.311103200170410-30.2514.302.163102180150410-2114.02.1631023mmPbX410-20.2514.205.102103mmPbX410-30.2512.605.102103mmPb4.3.4.4數(shù)

8、字胃腸機(jī)房屏蔽設(shè)計的評價和核實(shí)（1）數(shù)字胃腸機(jī)房評價參數(shù)H410-2mSvweek-i410-3mSvweek-iW1000mAmin-week-iE125kV700cm20.24%UU=iU=0.25U=iTT=iT=0.25（2）數(shù)字胃腸機(jī)房屏蔽厚度的計算結(jié)果按以上評價參數(shù)和評價公式（20）-（22），計算出的所需度列于表4-9。表4-9數(shù)字胃腸機(jī)房所需屏蔽厚度計算結(jié)果mSv1week-1TU(m)K(mm)(mm)410-20.250.254.009.76610200160410-30.250.253.001.736103200165410-30.250.254.009.766102200150410