氡檢(jian)(jian)測是指(zhi)使用采樣(yang)泵或自(zi)由(you)擴散方法將待測空氣中的(de)(de)氡抽入或擴散進入測量(liang)室(shi)，氡濃(nong)度檢(jian)(jian)測，通(tong)過直接測量(liang)所收(shou)集氡產生的(de)(de)子(zi)體產物(wu)或經靜電(dian)吸附濃(nong)集后的(de)(de)子(zi)體產物(wu)的(de)(de)ɑ性，推算(suan)出(chu)待測空氣中的(de)(de)氡的(de)(de)濃(nong)度的(de)(de)測量(liang)過程(cheng)。

測定儀器

播(bo)報活性炭盒（GB/T14582），土壤中氡濃度檢測(ce)費用，徑跡蝕刻(ke)探測(ce)器（GB/T14582），連續氡測(ce)量儀（IEC61577——2），雙濾(lv)膜法測(ce)氡儀（GB/T14582），閃爍瓶法側氡儀（GB/T16147）等(deng)。

性能指標

播報(bao)測量范圍：10~105Bq/m3;探(tan)測下(xia)限：10Bp/m3；測量結(jie)果(guo)的不確定度(du)：25%（置(zhi)信度(du)95%）；環境條件(jian)：溫度(du)0~40℃，相對濕(shi)度(du)90%，30℃。

氡濃度檢測步驟

為(wei)評價(jia)室內氡(dong)水(shui)平，分兩步(bu)測量：

步(bu)篩選測(ce)量，土(tu)壤氡濃(nong)度檢測(ce)怎么做(zuo)，用以快速判定建筑物是否對其居住者將產(chan)生(sheng)高輻照的(de)潛在(zai)危險。

第二步跟蹤測量(liang)，用以估(gu)計(ji)居住者的健康危險度以及對質量(liang)措施做出(chu)評(ping)價。

篩選測量

篩(shai)選(xuan)測(ce)量(liang)(liang)用以快速判(pan)定建(jian)筑物內是否含有高濃度(du)氡(dong)氣，以決定時(shi)候需(xu)要或采(cai)取(qu)哪類跟蹤測(ce)量(liang)(liang)。篩(shai)選(xuan)測(ce)量(liang)(liang)特點時(shi)花費(fei)少而且操作簡單，不會把時(shi)間(jian)或經費(fei)浪費(fei)在那些對健康不構成威脅的(de)室(shi)內環(huan)境。篩(shai)選(xuan)測(ce)量(liang)(liang)采(cai)樣時(shi)間(jian)列于(yu)表N.1。表N.1篩(shai)選(xuan)測(ce)量(liang)(liang)的(de)采(cai)樣時(shi)間(jian)儀(yi)器(qi)采(cai)樣時(shi)間(jian)活性炭盒(he)2~7d徑跡蝕刻探(tan)測(ce)器(qi)3個月連續氡(dong)檢測(ce)儀(yi)至少6h，24h或更長雙濾膜法測(ce)氡(dong)儀(yi)至少6h，24h或更長閃爍瓶法側氡(dong)儀(yi)1min（代表性較差）

土(tu)壤氡檢測(ce)是在(zai)土(tu)方開挖前(qian)嗎？

土(tu)方開挖后(hou)要(yao)進行土(tu)壤(rang)氡(dong)濃(nong)度檢測(ce)

氡(dong)(dong)氣(qi)是危害人們身體bai健康的(de)輻射(she)源之一(yi)。在民(min)用建(jian)(jian)(jian)筑(zhu)(zhu)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)施工(gong)(gong)(gong)(gong)前，需要(yao)進行場(chang)地(di)(di)土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度的(de)測(ce)(ce)量。《民(min)用建(jian)(jian)(jian)筑(zhu)(zhu)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)室內環境污染控制規范(fan)》(GB50325-2001)是民(min)用建(jian)(jian)(jian)筑(zhu)(zhu)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度測(ce)(ce)量方(fang)法的(de)主要(yao)依(yi)據。當地(di)(di)土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度實測(ce)(ce)平均(jun)值(zhi)較低(di)(不(bu)(bu)大(da)于(yu)10000Bq／m3)、且工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)地(di)(di)點(dian)無地(di)(di)質斷裂構造時(shi)，建(jian)(jian)(jian)筑(zhu)(zhu)氡(dong)(dong)濃(nong)(nong)度檢測(ce)(ce)，土(tu)壤(rang)(rang)氡(dong)(dong)對工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)的(de)影響不(bu)(bu)大(da)，工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)可不(bu)(bu)進行土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度測(ce)(ce)定(ding)(ding)。當已知(zhi)當地(di)(di)土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度實測(ce)(ce)平均(jun)值(zhi)較高(gao)(大(da)于(yu)10000Bq／m3)或工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)地(di)(di)點(dian)有地(di)(di)質斷裂構造時(shi)，工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)仍需要(yao)進行土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度測(ce)(ce)定(ding)(ding)。土(tu)壤(rang)(rang)氡(dong)(dong)濃(nong)(nong)度不(bu)(bu)大(da)于(yu)20000Bq／m3時(shi)或土(tu)壤(rang)(rang)表面氡(dong)(dong)析出(chu)率不(bu)(bu)大(da)于(yu)0.05Bq／m2 ·s時(shi)，工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)設(she)計中可不(bu)(bu)采取防氡(dong)(dong)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(cheng)措施。