ML20055H837
| ML20055H837 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/23/1990 |
| From: | Marshall B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| References | |
| NUDOCS 9007310011 | |
| Download: ML20055H837 (2) | |
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RETURN. RECEIPT REQUESTED
-July l23,.1990!
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Mr. William L.:Kregloe
! Virginia' Water' Control Board j*i Valley Regional Office
'116LNorth-Main ~ Street P..O." Box 268
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Bridgewater, Virginia; 22812 1
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' Re - Unusual Discharge ~at North Anna = Power Station
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Dear Mr.'Kregloe:
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On J July " 19,.1990, partially - processed water from ~ the Reverse
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Osmosis (RO) Lsystem at North Anna iras directed to a storm drain in "
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error-.by' our. contractor,. Ionics,- corp..
Upon discovery the:
"i (discharge.was immediately discontinued and you were notified. - This-g clatter-confirms'that conversation.1 m
As you know/ the'RO system was..recentlyzplacedcinxits permanent j
configuration'..
Dischargesi from thew system ' are -included in L the i
VPDES? permit 4 soonttoLbe reissued..
Backwash from: the Laystem ?is.
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discharged;toJthe? settling pond,::the'RO? reject, after. relocation,
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,is' directed to the discharge tunnel,fandia? cold weather drain'linei il K
.is-dischargedito Lake. Anna. - L Itlwas ; thought that. all' discharges!
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- were: accounted ; for.z Investigation : revealed,: -however, :that partially' processed water that does -not meet stringent requirements y
-forfplantsmakeupiistblown down from individualt: resingbeds1on.an
' intermittent ~ basis when the resins' are-. spent and -require-j
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- replacement. This blowdown hastapparently occurred twicisince the y
-reconfiguration.
in~, late l June, on' LJuly:
10- and JJuly? 19.?
1 Approximately.500 gallons' of blowdown were dhcharged oni July 110i
- f..- _and j perhaps 200 gallons - on ' July 19 E before the > ischarge.was q
M w%e interrupted.
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)Thel discharge properly ~ should be included as part of the:RO' reject.
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-AlterationLof the : piping Lto include this discharge is currently
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.being evaluatedL The outlet:to the stormdrain has been permanently-H f
Ecapped.and no further discharge 'is. anticipated. -We will inform you R
@w when.a permanent solution has been ir.plemented.
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FC Mr. ~ William L;:. Kregloe July 23,c1990 4
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It'you have'any further' questions regarding this incident, please-(
. contact my. office..
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Sincerely,:
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-B..M. Marshall,-P.E.
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Manager.
Water.. Quality l
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U'.. S. NRC ~
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' Docket:No. 50-338/50-339 1017MariettatStreet, NW Suite:2900
. Atlanta,>Gsorgia 30323 o
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- Attn:
Docket' control Desk'
- Docket No. 50-338/50-339
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- i 1 Washington, D.C.
20555
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..NRC Senior Resident Inspector Docket ~No. 50-338/50-339-t-
North Anna-Power Station J
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