Valve yangiritse muri sisitemu yihutirwa yinganda za kirimbuzi za LaSalle

Muri iyi mpeshyi, itsinda ry’ubugenzuzi bwihariye bwa NRC (SIT) ryakoze igenzura ry’uruganda rukora ingufu za kirimbuzi rwa LaSalle kugira ngo rukore iperereza ku cyateye kunanirwa na valve no gusuzuma imikorere y’ingamba zafashwe. Ibice bibiri by’uruganda rukora ingufu za kirimbuzi rwa LaSalle County rwa Exelon, nko mu bilometero 11 mu majyepfo y’iburasirazuba bwa Ottawa, muri Illinois, ni amashanyarazi y’amazi (BWR) yatangiye gukora mu ntangiriro ya za 1980. Nubwo BWR nyinshi zikorera muri Reta zunzubumwe zamerika ari BWR / 4 hamwe nigishushanyo mbonera cya Mark I, ibikoresho "bishya" LaSalle bifashisha BWR / 5 hamwe nigishushanyo mbonera cya Mark II. Itandukaniro nyamukuru muri iri suzuma ni uko nubwo BWR / 4 ikoresha sisitemu yo gutwarwa n’umuvuduko ukabije w’imashanyarazi (HPCI) kugirango itange amazi akonje yinyongera kuri reaktor niba umuyoboro muto uhujwe nubwato bwa reaktor yaturika, gukoresha BWR / 5 Sisitemu itwarwa na moteri yumuvuduko mwinshi wa spray (HPCS) igera kuriyi nshingano zumutekano. Ku ya 11 Gashyantare 2017, nyuma yo gufata neza no gupima sisitemu, abakozi bagerageje kuzuza sisitemu ya 2 y’umuvuduko ukabije wa spray (HPCS). Muri kiriya gihe, reakteri ya Unit 2 yarahagaritswe kubera guhagarika lisansi, kandi igihe cyo gutaha cyakoreshwaga mu kugenzura ibintu byihutirwa, nka sisitemu ya HPCS. Sisitemu ya HPCS mubisanzwe iba ihagaze mugihe ikora reaction. Sisitemu ifite pompe itwarwa na moteri ishobora gutanga imigozi yinyongera ya litiro 7,000 kumunota kubwato bwa reaction. Pompe ya HPCS ikura amazi mu kigega cyabigenewe. Niba umuyoboro muto wa diametre uhujwe nubwato bwa reakteri wacitse, amazi akonje azava, ariko umuvuduko uri imbere yubwato bwa reakteri ukoreshwa nuburyo bwihutirwa bwihuse (urugero, gusohora ubushyuhe bwimyanda hamwe na pompe yumuvuduko ukabije wa pompe ). Amazi ava mu miyoboro yamenetse asohoka mu kigega cyo guhagarika kugirango yongere akoreshwe. Pompe ya HPCS itwarwa na moteri irashobora gukoreshwa na gride itari kumurongo mugihe iboneka, cyangwa mumashanyarazi yihutirwa ya mazutu mugihe gride itaboneka. Abakozi ntibashoboye kuzuza umuyoboro uri hagati ya HPCS inshinge (1E22-F004) n'ubwato bwa reaction. Bavumbuye ko disiki yatandukanijwe nuruti rwikariso ya clapper ebyiri yakozwe na Anchor Darling, ikabuza inzira itembera umuyoboro wuzuye. Umuyoboro wa HPCS ni umuyonga usanzwe ufunze amashanyarazi afungura iyo sisitemu ya HPCS itangiye gutanga umuyoboro wamazi yo kwisiga kugirango agere kumato wa reaction. Moteri ikoresha torque kugirango izunguruke igiti cya spiral kugirango izamure (fungura) cyangwa hepfo (gufunga) disiki muri valve. Iyo igabanutse rwose, disiki izahagarika imigezi inyuze muri valve. Iyo flap ya flap yazamutse neza, amazi atembera muri valve atemba ntakabuza. Kubera ko disiki yatandukanijwe nigiti cya valve mumwanya wamanutse rwose, moteri irashobora kuzenguruka igiti cya valve nkaho izamura disiki, ariko disikuru ntigenda. Abakozi bafashe amashusho ya disiki ebyiri zatandukanijwe nyuma yo gukuraho igifuniko cya valve (amaboko) ya valve (Ishusho 3). Uruhande rwo hasi rwuruti rugaragara hagati yishusho. Urashobora kubona disiki ebyiri hamwe nuyobora umurongo hamwe (iyo uhujwe na stem stem). Abakozi basimbuye ibice by'imbere muri valve ya inshinge ya HPCS n'ibice byahinduwe nuwabitanze, bongera gushimangira igice cya 2. Ubuyobozi bw'ikibaya cya Tennessee bwagejeje raporo kuri NRC muri Mutarama 2013 munsi ya 10 CFR Igice cya 21 cyerekeye inenge ziri mu cyuma cya Anchor Darling zibiri za disiki muri sisitemu yo gutera inshinge nyinshi zo mu bwoko bwa Browns Ferry. Ukwezi gukurikira, uwatanze valve yashyikirije NRC raporo 10 ya CFR Igice cya 21 yerekeranye nigishushanyo mbonera cya Anchor Darling double disc gate gate, gishobora gutuma igiti cya valve gitandukana na disiki. Muri Mata 2013, Itsinda rya ba nyir'amazi meza abira batanze raporo kuri raporo y’igice cya 21 ku banyamuryango bayo ndetse banasaba uburyo bwo kugenzura imikorere y’imyanda yibasiwe. Ibyifuzo birimo ibizamini byo gusuzuma no gukurikirana kuzenguruka kuruti. Muri 2015, abakozi bakoze ibizamini byo kwisuzumisha kuri HPCS inshinge 2E22-F004 muri LaSalle, ariko ntakibazo cyabonetse. Ku ya 8 Gashyantare 2017, abakozi bakoresheje umurongo ngenderwaho wo kugenzura uruziga kugira ngo babungabunge kandi bapime indege ya HPCS inshinge 2E22-F004. Muri Mata 2016, itsinda rya nyiri reaction y’amazi abira yavuguruye raporo yabo ashingiye ku makuru yatanzwe na nyir'urugomero rw'amashanyarazi. Abakozi basenye 26 Anchor Darling ya kabiri ya disiki ya vatiri ishobora kwibasirwa basanga 24 muri bo bafite ibibazo. Muri Mata 2017, Exelon yamenyesheje NRC ko indege ya HPCS inshinge 2E22-F004 yakoze nabi kubera gutandukanya uruti rwa valve na disiki. Mu byumweru bibiri, itsinda ry’ubugenzuzi bwihariye (SIT) ryahawe akazi na NRC ryageze i LaSalle kugira ngo rikore iperereza ku cyateye kunanirwa na valve no gusuzuma imikorere y’ingamba zo gukosora zafashwe. SIT yasuzumye isuzuma rya Exelon ryerekana uburyo bwo kunanirwa kwa valve 2 ya HPCS. SIT yemeye ko ikintu kiri imbere muri valve cyacitse kubera imbaraga nyinshi. Igice cyacitse gitera ihuriro hagati yikibabi cya valve na disikuru ihuza ibice kuba bike kandi bidahujwe, kugeza igihe disikuru ihuza amaherezo itandukanijwe nigiti cya valve. Utanga isoko yongeye guhindura imiterere yimbere ya valve kugirango akemure ikibazo. Exelon yamenyesheje NRC ku ya 2 Kamena 2017 ko iteganya gukosora izindi 16 zijyanye n’umutekano n’ingirakamaro z’umutekano Anchor Darling zifite amarembo abiri ya disiki, zishobora kwibasirwa n’ibi mu gihe cyo guhagarika lisansi y’ibice byombi bya LaSalle. Ingaruka zuburyo bwo kunanirwa. SIT yasuzumye impamvu Exelon yo gutegereza gusana iyi valve 16. SIT yizera ko impamvu yumvikana, usibye imwe-ya valve yo gutera inshinge ya HCPS ku gice cya 1. Exelon yagereranije umubare wikizunguruka cy’ibikoresho byo gutera inshinge za HPCS ku gice cya 1 n’igice cya 2. Igice cya 2 valve cyari ibikoresho byumwimerere byashyizweho mu ntangiriro ya za 1980 , mugihe valve ya Unit 1 yasimbuwe muri 1987 nyuma yo kwangirika kubera izindi mpamvu. Exelon yavuze ko umubare munini w’imitsi ya valve ya Unit 2 wasobanuye ko watsinzwe, kandi hari impamvu yo gutegereza kugeza igihe ubutaha bwo guhagarika lisansi kugira ngo ikibazo gikemuke cya Unit 1. SIT yavuze ibintu nkibinyuranyo by’ibizamini bitamenyekana mbere y’ibikorwa hagati ibice, itandukaniro rito ritandukanye ningaruka zitazwi, ibiranga imbaraga zumubiri zidashidikanywaho, nibitandukaniro bidashidikanywaho mumatara ya valve kugirango yambare umugozi, hanyuma asoza avuga ko "iki aricyo" ikibazo cyigihe "aho kugirango" Niba "1E22-F004 Umuyoboro uzananirwa niba nta kunanirwa mugihe kizaza. Muyandi magambo, SIT ntabwo yaguze igenzura ryatinze rya valve ya Unit 1 Exelon yafunze LaSalle Unit 1 ku ya 22 kamena 2017 kugirango isimbuze ibice byimbere bya HPCS inshinge 1E22-F004 yasanze indangagaciro za torque zakozwe na Exelon kuri moteri ya HPCS yo gutera inshinge 1E22-F004 na 2E22-F004 yarenze 10 CFR Igice cya 50, Umugereka B, Igipimo cya III, Igenzura rya Exelon rivuga ko uruti rwa valve ari ihuriro ridakomeye kandi rishyiraho moteri ya moteri itagaragaza umuvuduko ukabije kuruti rwa valve. Ariko ihuriro ridakomeye ryabaye ikindi gice cyimbere. Agaciro ka moteri ikoreshwa na Exelon yashyize igice mukibazo cyinshi, bigatuma kimeneka na disiki gutandukana nigiti cya valve. NRC yemeje ko iryo hohoterwa ari ihohoterwa rikomeye ryo mu rwego rwa III rishingiye ku kunanirwa na valve yabujije sisitemu ya HPCS gukora imirimo y’umutekano (muri sisitemu yo mu nzego enye, urwego I ni rwo rukomeye). Icyakora, NRC yakoresheje ubushishozi bwo kubahiriza amategeko hakurikijwe politiki yo kubahiriza amategeko kandi ntiyatangaza amakosa. NRC yemeje ko inenge yububiko bwa valve yari yoroheje cyane kuri Exelon kugirango itekereze neza kandi ikosore mbere yo gutsindwa kwa Unit 2. Exelon yasaga neza muri ibi birori. SIT ya NRC yerekana ko Exelon izi raporo Igice cya 21 cyakozwe n’ubuyobozi bw’ikibaya cya Tennessee n’umutanga wa valve mu 2013. Ntibashoboye gukoresha ubwo bukangurambaga kugira ngo bamenye kandi bakosore ibibazo by’ibikoresho byo gutera inshinge Unit 2 HPCS. Ibi mubyukuri ntabwo byerekana imikorere yabo mibi. N'ubundi kandi, bashyize mu bikorwa ingamba zasabwe n'itsinda rya nyiri amazi atetse kuri raporo ebyiri Igice cya 21. Ibibi biri mubuyobozi, ntabwo Exelon yabishyize mubikorwa. Ikosa ryonyine mu gukemura ikibazo cya Exelon ni uko impamvu yo kuyobora Igice cya 1 yari ifite intege nke mbere yo gusuzuma niba indege yacyo ya HPCS yangiritse cyangwa yangiritse, kugeza igihe ibizakurikiraho byari byahagaritswe. Ariko, SIT ya NRC yafashije Exelon gufata icyemezo cyo kwihutisha gahunda. Kubera iyo mpamvu, Igice cya 1 cyafunzwe muri kamena 2017 kugirango gisimbure valve itishoboye. NRC yasaga neza cyane muriki gikorwa. Ntabwo NRC yayoboye Exelon ahantu hizewe kuri LaSalle Unit 1, ariko NRC yanasabye inganda zose gukemura iki kibazo nta gutinda bidafite ishingiro. Ku ya 15 Kamena 2017, NRC yamenyesheje ba nyir'uruganda amakuru y’amakuru ya 2017-03, yerekeranye n’ubusembwa bw’imiterere ya Anchor Darling double disc gate valve ndetse n’imbogamizi z’amabwiriza yo kugenzura imikorere ya valve. NRC yakoresheje inama rusange hamwe ninganda nabahagarariye abatanga ibicuruzwa kuri valve kukibazo nigisubizo cyacyo. Kimwe mu byavuye muri iyo mikoranire ni uko inganda zashyize ahagaragara urutonde rw’intambwe, gahunda yo gutuza ifite igihe ntarengwa ntarengwa bitarenze ku ya 31 Ukuboza 2017, n’iperereza ku ikoreshwa ry’imyenda ya Anchor Darling ifite amarembo abiri y’ingufu za kirimbuzi muri Amerika ibimera. Iperereza ryerekana ko hafi 700 ya Anchor Darling ya kabiri ya disiki ya ADD (AD DDGV) ikoreshwa mu nganda zikoresha ingufu za kirimbuzi muri Amerika, ariko imibande 9 yonyine niyo ifite ibimenyetso biranga ibyago byinshi / biciriritse, n’imitsi myinshi. . inganda ziracyafite umwanya wo kugarura kunanirwa kuva kunesha, ariko NRC isa nkiteguye kubona ibisubizo mugihe kandi cyiza bivuye muriki kibazo. Ohereza SMS "SIYANSI" kuri 662266 cyangwa wiyandikishe kumurongo. Iyandikishe cyangwa wohereze SMS "SCIENCE" kuri 662266. SMS n'amafaranga yamakuru arashobora kwishyurwa. Inyandiko ihagarika guhitamo. Nta mpamvu yo kugura. 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