05000325/LER-1981-057-03, /03L-0:on 810826,reactor Water Chloride Concentration Exceeded Limit.Caused by Personnel Incorrectly Arranging Reactor Bldg Component Cooling Water Sys Piping to Seal Cooler of Reactor Water Cleanup Pump 1B

/03L-0:on 810826,reactor Water Chloride Concentration Exceeded Limit.Caused by Personnel Incorrectly Arranging Reactor Bldg Component Cooling Water Sys Piping to Seal Cooler of Reactor Water Cleanup Pump 1B

ML20010G621
Person / Time
Site:	Brunswick
Issue date:	09/11/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010G618	List: 05000325/LER-1981-057, Forwards LER 81-057/03L-0 05000325/LER-1981-057-03, /03L-0:on 810826,reactor Water Chloride Concentration Exceeded Limit.Caused by Personnel Incorrectly Arranging Reactor Bldg Component Cooling Water Sys Piping to Seal Cooler of Reactor Water Cleanup Pump 1B
References
LER-81-057-03L-01, LER-81-57-3L-1, NUDOCS 8109220321
Download: ML20010G621 (2)

LER-1981-057, /03L-0:on 810826,reactor Water Chloride Concentration Exceeded Limit.Caused by Personnel Incorrectly Arranging Reactor Bldg Component Cooling Water Sys Piping to Seal Cooler of Reactor Water Cleanup Pump 1B

Event date:
Report date:
3251981057R03 - NRC Website

text

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION l

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LICENSEE EVENT REPORT CONTROL BLOCK: l l

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60 61 DOCKET NUMBER 68 69 EVENT D AT E 74 76 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l lDuring plant shutdown operations, reactor ccolant chemistry analysis revealed that l

l reactor water chloride concentration had exceeded the specified limit of <.2 ppm.

g l o,3 l LoE IReactor water chloride concentration remained >.2 ppm for 13.6 iiours with a maximun l

loIsl l recorded value of.3 ppm.

This event did not affect the health and safety of the l

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CODE TYPE No.

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42 43 44 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i 101 l An incorrect arrangement of RBCCW System piping to the seal cooler of 1B RWOU pump 1i j i j l resulted in high chloride concentration water in the RWCU System return to the reactor.I Ii i ? I l RBCCW te IB RWCU pump was isolated and reactor chloride concentration was reduced to i

The involved 13 l l <.2 ppm by utilizing the "A" RWCU pump and filter demineralizer.

l I1 I i I 4 I I maintenance personnel will be counseled concernirig this event.

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LER ATTACHMENT - RO #~1-81-57 1

Facility:.BSEP Unit No.1 Event Date: 8/26/81

'"his event' occurred as a result of a personnel error when flexible piping from 4

the -RBCCW System associated with the seal cooler unit of IB RWCU. pump was incorrectly connected, causing the pump inner seal cavity to become pressurized i

and allow RBCCW to leak into the RWCU System. As designed, the RBCCW System:

utilizes the same size flexible piping to and from the cooler low and high pressure connections. In this case, the high. pressure RBCCW return line from the cooler was mistakenly connected to the -cooler low pressure. inlet' and the' cooler low pressure supply line was connected to the seal cooler high pressure

' outlet connection, causing the pump interseal' cavity to pressurize and allow RBCCW to. leak past the pump. inner seal into the pump casing and the RWCU System.

Following this ~ avent, the RBCCW flexible piping to the cooler. was. correctly connected and IB RWCU pump was returned to service. The involved maintenance personnel will be cour.seled to ensure their awareness of the importance of l

establishing correct piping arrangements following maintenance to plant equipment. In addition, color coding of the RBCCW System flexible piping to the RWCU pump - seal ~ crolers of both Unit Nos. I and 2 is - presently under.

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f consideration 'as a possible preventative action.

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