ML19209D269

LER 79-087/01T-0:on 791004,seven Nuclear Svcs Closed Cycle Cooling Sys Hangers Did Not Meet Safety Requirements Per IE Bulletin 79-02.Caused by Inadequate Hanger Design.Mod Initiated,Providing Min Safety Factor of Four

ML19209D269
Person / Time
Site:	Crystal River
Issue date:	10/17/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19209D267	List: ML19209D266 ML19209D269
References
LER-79-087-01T, LER-79-87-1T, NUDOCS 7910220293
Download: ML19209D269 (2)

Text

- -

mS . . \

. p ' \\ t s f f

} +i,{u-13 \\ \ (* U. S. NUCLC AR R ECUL Af oRY CQMMISSION MaC 70nn43GG (111l & pQkg Ql? ~ .b ' EXHIBIT A 1.!CENSEE EVENT REPORT con 7acL stocs:.

$ Qg@! I l- 1 I l trLEasE rns=r oa rvre ALL atoviato iNsonvATioNi

. .@ 4

[TF1. ,iF i Li6,us,u C; miR1 Pi 3 tgl:0 ; 01- 1 0s.ul u.0l, 0 i Oj0 1 ;0 3 0;gg 9 1l 1 ;l ( 1 g _u, g _ l g

, . . . n  :. t .a u. .. -

. i.

cov7 o i g' Qgt 01 51 0t -to i3:0 t 2 g; :ocu r se ,u. **

1 0 ; 0l 4 7;9g[1[0lli 9

a,a=r o  :. w =i wr o ra il7l9l@ .a i e w ..

EVENT CE$CRirTICN AfaQ PRCS A8LE CONSECu!NCES At 1815 it was 9 ported that s ven (7) Nuclear Services Closed Cycle Cooling g, (SW System) hangers did not meet the minimum safety factor requirement of I This created an event reoortable under Technic,1 I o . l Tv %,'inein 70 no g, Specification 6.9.1.8.1. No effect upon the plant or eeneral public. This!

is the second occurrence of this type, reported. Reference LER 79-61. l 06, l Jis l SW171u CauSE 06.13 C3"' satse CODE COct $4fCO:3 CC'J'C%E'I 03I Ib30 03 3=3CO 3 a ,

i Z f Zl@ W@ l Al@ l S UI PIOl Rl]e @ W @

CCC;;t e g s;t a g e0g y og si$ icy

$ t c.;t sTI A L "gsts?vtae steent so. CDCI **

• f N3

@ ;gg, ig,"3

.l 1, 71 91 8u f0 18 17I y

0 I il a .,

i 11

[--j

.. IA..I aT AC, saa:a e a a.3 a,:.f o c0.r*0 . gn v

? "? *.1 acv cw setcag J car..s ac tuage TAA4% ACTics E 8 81:s* ? $"v g**0c 3N8L =c:c.t 0.85 545 "*1: s;e.. . n

. 3,ss-, ga lN!@ I A j@ l PJ 3 f 1, 71Q lZl@

11 @ )l 01 i {_Y,,J @

CAvst cE5 cairn N AN::052ECmi A: SONS g 7, , e [.ne cause of this event is attributed to an inadeonate han2er desien.

Modi- I fication 79-6-86F has been initiated to rework the affected hangers to oro- t vide a minimum safety factor of four (4). Rework will be completed during thq

, , ; next plant outage or by 1 January 1980. I i a I

1 so

, s ,

's'r**'b' J s' s ,2:= ov-ta status @ 5.'sSilN  : s-:r. . ::::... .: . @

W W@ l 11010 l@l '

NA I

lDl@l Notification from A/E 82 l

' .e'r.s.r, c:d.ist (Scar.;s os aggga:3 ett!4543 Os af.t ast ..f7 sT sa0?wafv 1 6 @ [_Z,J@l NA l l n l egaso3*,gg g asJ5%Et1 sevo t e ' vet :t s; e.* f,3%

i 10101 OGLZ,J@l NA l

etas:ssg'g$sj[a.gg

[U" la 1p 0s (*; 0lglOtScenev.;

is i; NA aJ j

'.0$$ 08 :s tava. E ?O 8 Ace.if =

' 0 8 5.* ** *0%

NA l liJ L{tJ81 a 9 . g3

. sac Lu c'a v

n .,bg7@'$t,';. l ,,.as @ NA t ii eiitiiiiii!

, . , . .2

. . 2 .

NA* g Cs paE' AREA-

• P '=CNE (904) 795-6486 (SEE ATTACHED SUPPLDENTARY INFOP3.ATION SEEET)

- - 4<Z3 095 7D10220~' ->

SUPPLEMENTARY INFORMATION Report No.: 50-302/79-087/0lT-0 Facility: Crystal River Unit #3 Report Date: 11 October 1979 Occurrence Date: 4 October 1979 Identification of Occurrence:

Degradation of seven P) service water hangers reportable under 6.9.1.8.1.

Conditions Prior to Occurrence:

Mode 1 power operation (100%).

Description of Occurrence:

At 1815 following an engineering evaluation conducted by Gilbert Associates, it was reported that seven (7) NuclearServices Closed Cycle Cooling (SW System) hangers did not meet the re-quirements of IE Bulletin 79-02. SW System hangers SWH-404A 429A, 431A, 432A, 449A, 451A, and 478A had a safety factor less than two (2).

Designation of Apparent Cause:

The cause of this event is attributed to an inadequate hanger design.

Analysis of Occurrence:

No effect upon the plant or general public.

Corrective Action:

Modification 79-6-86F has been initiated to rework the affected hangers to provide a minimum safety factor of four (4). Rework will be completed during the next plant outage or by 1 January 1980.

Failure Data:

This is the second occurrence of this type reported. Reference LER 79-61.

/rc ii73 096