ML19308D281

RO-77-06:on 770130,wall Crack Discovered in eight-inch Schedule 40-304 Stainless Steel Bldg Spray Pipe Inside Containment Bldg.Caused by Stress Corrosion Cracking Due to Chlorides & Oxygen.Investigation Continuing

ML19308D281
Person / Time
Site:	Crystal River
Issue date:	02/07/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D098	List: ML19308D097 ML19308D281
References
NUDOCS 8002270727
Download: ML19308D281 (1)

Text

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n LICENSEE EVENT HEPOHf ek CONTROL BLOCX ' l l l l l l ;pLEATE p7.lNT ALL CECUIRED INFORMATIOTJ)

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NAdE tcENSE NuMeER *

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V8 9 14 l 0 l 0l-l0 l 0l 0l 0l 0 l-l 0 l 0 l 15 25 l4l1 26 l1l1l1l 30 l 0l 1l 31 32 CATEGORY

• T n OOCKET NUMBER EVENT OATE REPORT OATE O 1 CONT I I* l (_LJ l Ol 5l0 l- l0 l 31 0l 2 l l0 l1l 3l 0l 7l 7l l0 l 2l 0l 7l 7l 7l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION HE l Discovery of a through wall crack in an eight. inch Schedule 40 304 stainless l

7 89

@l 7 89 steel building spray pipe-inside the containment building. Crack is in heat 80

@[ l af fected zone of a pipe-to-pipe weld. The systen may have contained stagnant l 7 89 80 M l water. This is the second occurrence of this nature. l 7 o9 80 UE I (77-6) l 69 Pave eO C E CODE COMPONENT CODE R MANUF C A VOLATON

$ l S! A l [1]

7 80 10 11 l P l Il Pl ElX lX l 12 17 lAl 43 44 l Kl 0 l 5 l 5 l ]4a 47 CAUSE OESCRIPTION U .

$l 7 89 Suspected stress corrosion cracking due to presence of chlorides and oxygen. l 80 Ml Investigation is continuing in accordance with IE Circular 76-06.

l 7 89 80 I

l FA01UTY METHOO OF l STATUS  % POWER OTHER STAIUS DISCOVERY OtSCOVERY OESCRiPTON 7 8 9 W l0 l0 l0 l l 10 12 13 Mode 5 ~ l 44

{45 l Leakage noted by plant Operator 46 l

80 AC TIYtTY CONTENT REL EASs 0 OF HELEASE AMOUNT OF ACTIVITY LOCATON OF RELEASE

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7 8 9 U Ul 10 11 NA l 44 l

45 l {

80 PERSONNEL EXPOSURES NUM0t R TYPE DESCRIPTON 13 I I I l Ul NA g

7 89 11 12 13 80

• PERSONNEL INJURIES NUMBE R DESCRIPTON i l l l l l NA l

7 89 11 12 gg OFFSITE CONSEQUENCES

@l 7 80 NA l 00 LOSS OR DAMAGE TO FACILITY T YPt OCSCHtPTON i

7 09

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go I'tIllLICIT Y 8i NA y

OOmONAL FACTORS gQON W ve s, El J NAME: W. P. Stewart (A PHONE: (813) 866-4159 e , ,. ,...o,