05000361/LER-1982-003-01, /01T-0:on 820314,unplanned Dilution of RCS Resulted When Operators Were Trying to Restore Shutdown Cooling Flow.Caused by Two Manual Valves Being Partially Open Simultaneously While One Being Opened & Other Closed

From kanterella
(Redirected from ML20050L193)
Jump to navigation Jump to search
/01T-0:on 820314,unplanned Dilution of RCS Resulted When Operators Were Trying to Restore Shutdown Cooling Flow.Caused by Two Manual Valves Being Partially Open Simultaneously While One Being Opened & Other Closed
ML20050L193
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 03/30/1982
From: Ray H
SOUTHERN CALIFORNIA EDISON CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20050L181 List:
References
LER-82-003-01T, LER-82-3-1T, NUDOCS 8204140273
Download: ML20050L193 (1)


LER-1982-003, /01T-0:on 820314,unplanned Dilution of RCS Resulted When Operators Were Trying to Restore Shutdown Cooling Flow.Caused by Two Manual Valves Being Partially Open Simultaneously While One Being Opened & Other Closed
Event date:
Report date:
3611982003R01 - NRC Website

text

.

CONTROL BLOCK: l l

l l

l l

lh (PLE ASE PRINT OA TYPE ALL REQUIRED INFORMATIONI i

e 10131 IC I AlS I OIS I 21@l o I ol o I olo I olo I olo 1 ol ol@l 41111 1110 l@l I

l@

7 8 9 LICEte5EE CODE to 16 LICE NSE N A*.iE H 26 20 LICENSE Tvf E Jo 6# LA: 68 Cc-

.% l Ll@l 01510 I 010 I3 I 6 I vl@l o f 31114 I 8 l 2@l0131310 I 812 l@

3 8

E,J

&l DOCKET NvMSE R 6e 69 EVENT DATE 74 7b REPORT DATE to EVENT DESCAlPTION AND PROB ABLE CONSEQUENCES h a 2 I With the plant in Mode 6, an unplanned dilution of the Reactor Coolant I l o 131 l System occurred while operators were attempting to restore shutdown I

lojalI cooling flow.

RCS boron concentration remained above Technical I

lo lel l Specification limits throughout the event, thus public safety was l

IOic_]1 not endangered.

I o 7 I

I I

101611 so i

8 s DE

. CODE

$ BCO E COvPONENT CODE

$1.,8 DE S

E lo191 l ClB l@ W@ l Al@ l BIE I Bl Bl BlB l@ W@ [Bj @

7 8

9 10 11 12 13 18 tw 2W SE QUE NTI AL OCCUR RE NCE REPORT REVISION

,,,EVENTvfAR REPORT NO.

CODE TYPE N O.

@,*g g g po18 l 21 l-l l010l3l M

l oll l lT l l-l l0 l

',',y

_ 21 22 2J 24 26 27 28 29 30 31 32 TAK r A 1O ON PL NT MET HOUR 5 22 58 TT D FOH > B.

SUPPL 1 MAP FAC RER y@lG l@

lBl@

l Bl@

l 0] 0 l 0l 0 l lWl@

l Ni@

lBl@

l Bl 9 l 9l9 l@

3J J4 Jb h

3 40 41 42 43 44 47 cAUSE DESCAiPTION AND CORRECTIVE ACTIONS IiIoiI While attempting to restore pump flow, one operator opened the Refuelinct li li l I Water Storace Tank Suction Line Manual valve while another was closina i A] the RCS Suction Line Manual Valve.

While the valves were both partia11M lil3ll open, water was added to the RCS.

A caution statement will be added tol 11 121 l the Onerating Procedure for the Shutdown Cooling System.

l 80

)

7 8 9 STA US N POWE R OTH E R ST A TUS SCO RY OtsCOVE RY DESCRtPTION NA l

lAl@l Operator Observation l

11 151 lB l@ l0 l 0 l Ol@l ACTIVITY CO' TENT RELEASE AVOUNT OF ACTIVITY LOCATION OF RE LE ASE l i I C l I B l @D OF RELE ASElBl@l NA l

l NA l

3 8 9 10 11 44 45 go PE RSONNE L E XPOSUR ES NUUB E R TvPE C E !CairtioN li I:110 I ol o l@l B l@l N

l pes 50sNE t in2u'.5ts cESCR:n,0% @

N A No..P E R l

[IlTl [0 l 010 l@l 7

6 9 11 12 60 lot $ OF OR C AY AGE TO 5 ACsLtiv T VPE DE SCR'FiiON F 1 LBJ @l NA l

7 8 9 10 30 IS$UE E@DESC 8tiP TION l

NA l

llIl11111ll!15 12l"I 7

8 9 to 08 69 80 3

!!. B. Ray 47VAW I

PHONE:

NAYE Or pnErAnrn 8204140273 820330

[

PDR ADOCK 05000361

.. p CDrc@