ML19276H399
| ML19276H399 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/08/1975 |
| From: | Guttann H, Swain A SANDIA NATIONAL LABORATORIES |
| To: | |
| Shared Package | |
| ML19209C834 | List: |
| References | |
| TASK-TF, TASK-TMR NUDOCS 7910180421 | |
| Download: ML19276H399 (6) | |
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briefly ths :Sthed.svolves the use of tree
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rebattlities ass. :ed to the success art 1 2ees
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- 1:1:4 of r
wles.. set O.
inspecter a:4 si.bsequently corrected, and so
. as s rs Alt. tow,5 t is say e--
r.r -ri.:
..,,? ;rt:::111 ties assccisted w tu the e:$
cn.
s.r e. t e r a s 11 in 1 ? cry W nts of m s:
s s Lmo - u m
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... e. f r use as a,. a s t and s ::ess f r * * ;;rticular ::erstics.
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8 bility. The tr:scues en the tree dia gess are 7 i s -- a c.iti is the ususi sense
=ct restrictei to h' =an actions nor d:es the
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cf s * ' ': ea.1:11 a. sic 7. alt:Ough it is method assi se inde;-nience of *te evests en c.
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- st fers of : Athe itical the trae--two ;erstating nasconcepticna accut
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.. 4 The errer rates used in a C3? actlysis
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.he variety of data scurces fcr
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s:r sf..att.
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c ?rstar totico 1. (la.31117) 33% rniaired
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hut &1 Ste 4 111989 is adar Scntt01.
w es....:a.a i:tes sne ;re sistaa *eliability
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It to not pessible or neesestrily destr.
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e s...ess s3:2stimes 131 strias ust?- -r:;-:s isJ.ts :: ;Lrt31e 13 b-J).
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s otter
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?;s rei., s.,..,.y a Cyste omses.1;ta vare a:tainaa fras -1,tary
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. :a t;::s r:,, re i n.r as P..:tions ar erise:t==vith less si:11stity to nu:leLr 7{.
,ti.
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ese t
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-lish ths at:ve, seversi n.: lear cilitta:ics saa tist-an:e star.s in :6:iset
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.: were r..: i ts ces:rvs ::.;:Ja p;.or ;.23:s.
T..e e :1si a :uas cf avat; tale c*
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'.; 2ryts:rs and c;eraters were cata vas a: swhat :- :r ns:esettatt:s tue 1
1 and. s trie:1e t ;rt;rts f:r sac;ti:a of "t.t e:tirstes
- f:r ::r.y t,
is w:s ::v.:wsi '
- au;.:4 a visit to ictivti4al ts.44
- ?. se esti stes involred a
'.-. s s i:1.: t r i a.i t,-). The ::c=
jui; irs the a;;11:st111ty of the data is
- ris. L:a s?.tas tr::ei.rss were rea:t:r taats ca t:s tasis of stillarity in
?.
.:istra:ive ;rs=
gerce;tual, c:1:1tive, a 4 sot:r ta; sets of s:.
.2.
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tuo t as ta.
cs' is is f:::s.
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3........', g3., ts *.*',.1 is case Osttais s; setal facters. stica ve call
~
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'a-.etics. tr.s ::rta., ;sra-ing Psrf re2-e Cra-iss Fa: tors ( ?) I vs-s
.a s ar. : :: Ors: :n ani rc. acte.a ::e tLaen 1sto a:::ur.t in =saina snase jui;: ente.
- s were to:r:.ca y reviavet (taa in, F:11cvin3 are t:e =4re 1:;:rttst of tasse ar:-
.s... tar.J....:..ssi....ty o.
f s:t:rs in e ciesr ;;ver 71-at et artti::a, e---*
. e ra.1 e-- te ;... e t a a a.,a.
esca =f wr.ich is triefly ils:sasst beiavt
- 2 : e n t s. viet. act e.: resa::able ts vir.:.s :;ers:.rs tad (1) *uality of hu=An en41neeri:3 of cca.
-r
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s is 1.str.:::1 t: - r:v-is us wits a trale and ?!s-1-ys.
- s_..
.a* cf ?:v * / wa.11 rss.t:1 to (2) C s;;ty of traiates ant ;rt:tice.
te a.
I.) t is St...tr..-:sta t ey were (3) Irise :e tra ;;Ality of v?itten 1:
1 to ta 3 et t relevsst certrol.
instru:ti:rs 6:4 mais:4 of ut e.
(' ) 7.7s of.11t;117 feer:tck.
sit;s s is v.11 to c;ir tea, at.4 ass: rite 4
L:. : 1 : ste t e f.1.;c.,s 2.s;6ay inal:a:iar.a.
($)
- ...;sna
- s of hu as actions.
ti 4 12;s..tr:rs :-J Jelays in (6)
L".
s ca..c.la:y.
1 :.. -
t:3.c r ses sa tr.ssa ;ree;(sa were cetad.
(7) Level cf ;rssesad ;;7ctelegisti f t to itsis cf t's aeove data, tree i:
41m ? ra were t6es pre ar-a taae;emauatly by In several cases the estimates of tasa t#
s.
T se..
. s ; :,.,.- : til errer rates vsre relttively ha-1 tectase tne
- le 1.'..rtaal :
a:tael.a re;aarea la case desig:s cf the sas.e :a.no interfames ta the
3
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Two stal.es tr.at f.ers t :ett.:n nere are bets ::.tsi2? ei eis st:s :t r.e Lees :f r..::=
'. ? -a,
-- e - st ' -
r-- : r res : ;;:sl fae::rs. In :n, st. y by *ne A:er;:s
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cf sa.a.Ary -??te r.res cf s::e ;; i -srs L{:.
- st;;.:es f:.* 5esest:3.* :ri ;:s1 ; :;4ests e.g.,,,cr ;r: :;e4 ullity, no distis:tive ver, :;;14::,1 fr,= ::r::.:
A. ;.. :- n 2 i
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a2 r:rews s *t e..
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e er.
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13 fire, *.re t; w g*
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a (4)
Al*ts' art swiitery/idsati pacal Id',cri*1c al in ;len* sve'sre err:r *s' e s-
&c.
- 3
- rs were.:ei fer c -of-tclersace C.it; that is.1:1 of tse ta=e ::e cr1*ita.7s
........3
- s. any
..e...e severs., c.,..ese actis,s cf tee aar revs is su:2 stress situa.
am y s;:rs v311.1 te a:: (with the a:11 tory ticss either : :e the sit; ati:.. worse Or did s: w er :e;.: ) r.1 w:.11 te cr: eti:4 f;r COI I## 18 f'11 d
- t.:.
tics :! ar.e c; erst:r. S ever si Is the seccat stuty, c:ntarted ty *he
?:rs st it* t t st 2 3re ve.-* ::s :ny L:.s. 2*s u-:es ? rs earca ".rg s.-itatica,' Ar y 6..
-..a e:::eting f-r st;*-sts: ar.: nst the re:ruats were sus.'ected t3 at:siste: e:erges.
c-3t117 10:sted die;1ays siculd be fewer la cies sata as its 13:res:i:4 ;r:21:li;" :f fa;-
er.
11:3 zertar she;;s to :: ir ::r:sa: ;:::s.
(}) Ciie-by-side 10:atiza of valves for
!ie re:ruits we, er; sed ts -tese s1=.lates "ini.-a:!ent* cr.s.c.-1s in certsin site..ar.
e=erreaties is sa:a a wsy ::a: they teLievet ey2: s celat ttst the v elves w:ali te 5 rested tte situatices
.he resa. AJ :s..y as :ce=
e2,::11:17 ss==. e ers::=g unit :t.e., cne t$1rd :r new 'er21 8 f1'8 12 7':1:* r$t:'r
... s. s.a.. i.j t.s s..o
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- m. eref..e....
ttas ;erfers see aJsig:ed taas tr.at would
-...y ef %i s s._.....o
.,.s
.ats vs.ves isve resultet is a cessatics =f tae scrta
.3 w:'.11 te esse-tially tte sa:e is the proca.
- *
- L5 '
till:7 of his ::ltta:4 to : yen eithar valve.
7tese studies were used as a basis f r Ti;s. }.: s ;erf:r:12:e
- o s le extent tegated estan11shicg toanJaries f:r ::e eritr rates the ;Lsr.ned 1:3e;ecie::e of the e*s-nels.
of :uelesy ;:.er ;;ast ;erse el is a hig:
(6) Is sore cases (e.g.. calibratica pro-stress situati n t such as a ;aree * :A). ::
re res) ther= vs2 eed.
s ti-*. derree of c. sa 18 'JI lik'IY SP25 820*'*f 311 2 7'T
"1
...s 7 (....
...- s,a e4...s..e1 woul.d react as cal.ily cr perf:rs as relia 3 *y ret at:y) 0:: tan?1 Cy using a two-::s teia "8
T ** ' Ti' Al# ;
'# 2 #~'"'*
~~8'1'#124 vitt. a rester /::::Aer an a ;erf:r:fr cf *ne tas extensive ;rs-tice O f s.:: c evs 1:
writ *ss ;r::etares.
- n ctner cases the degree siculated sir: stt r=erges::es.
Oe-e ral.y.
cf 2 c.s.
ra! -isney wis very 1:v. e.g.. a ta ' I' E8 li t* ' ' **/
83*8!** IT**EA#' 13 v CA.ar:;.r.
1..2;e:tt:a ;crim:4 en earn shif*,
si.=ulsted e:-m'.:m te'r : ers*ars of edear to see "if. all valves are in the correct
- 1 arts. He ce, tre err
- r ra o of ;;aas
- ,,g..
3*
c;erators is esti sted to te higher tsaa the 0.16 error rate caservel for 2A* crews.
(7) 7te excellent record of nuclear ; ewer
- 1s-t
- :ers:!ss witt:at an/ sericus at:1 dent On the other naad, react:r plant eiers Jr1 1:" ; r:- - tsilure of 'te engineered sste:y have been este-sively traires is n.21 esc ;cwor fes: e s : sis tr.e est: stien. 0;erster per.
- 1 ant c;eratics. A newly assigned c;erster f ar
- asce uater such stres s as..,uit.
The nas learned to rsesgnize the ;otential for 4
=ert se:tico :2: rites in mere detai. tew acc. dents, and ta be prepared to ce;e vita t
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