05000280/LER-1979-031-03, While Reviewing Liquid Waste Release Forms,Discovered That Liquid Waste Monitor Did Not Alarm High & Trip Release Valve During 791117 Isotope Activity Release.Caused by Personnel Error

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While Reviewing Liquid Waste Release Forms,Discovered That Liquid Waste Monitor Did Not Alarm High & Trip Release Valve During 791117 Isotope Activity Release.Caused by Personnel Error
ML18136A465
Person / Time
Site: Surry Dominion icon.png
Issue date: 11/21/1979
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18136A464 List:
References
LER-79-031-03X, LER-79-31-3X, NUDOCS 8002070291
Download: ML18136A465 (2)
v • d • e


LER-1979-031, While Reviewing Liquid Waste Release Forms,Discovered That Liquid Waste Monitor Did Not Alarm High & Trip Release Valve During 791117 Isotope Activity Release.Caused by Personnel Error
Event date:
Report date:
2801979031R03 - NRC Website
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text

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U.S. NUCLEAR REGULATORY COMMISSION e

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I 1fuile reviewing Liquid Waste Release forms, it was determined that on 11/17 /79, a release was made which contained isotope activity summations greater than l.SE-03 [ilTI uCi/cc (actual summation 1. 60E-03 uCi/cc).

The Liquid Haste Radiation Monitor did

_[]:II) J :ri()t __ alarm high and trip the release valve as re_qu_ired _by Technical Specifications l

3.7.E.

Since the releases did not exceed the limits allowed by Tech. Spec. 3.11.A.(2) I

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and 10CFR20 App. B, the health and safety of the public were not affected.

This [Q]IJ event is reportable per Tech. Spec. 6.6.2.b.(4).

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SYSTEM CODE

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CAUSE

CAUSE CODE SUBCODE COMPOc!ENT CODE LI@~@ I z I z I z I z I z I z 18 11 l::=J 12 13 SEQUENTIAL REPORT NO.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 42 43 44 I The Liquid Waste Radiation Monitor, on high activity ( 1. SE-03 (uCi/cc), provides QJJJ a trip** signal to the Liquid Waste Release valve.

Since the monitor can be calibrated [III]

to one isotope only, the administrative control disallows any releases with activity summations greater than l.SE-03 uCi/cc.

Personnel have been instructed to use care

((ill in filling out release forms.

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9 FACILITY

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STATUS

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DISCOVERY DESCRIPTION LJ@._J _R_e_v_i_e_w_o_f_f_o_r_m_s_. ______ --'-------'

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10 12 13 ACTIVITY CONTENT

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RELEASED OF RELEASE AMOUNT OF ACTIVITY G:TIJ ~

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N_A _____

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45 46 80 44 NA LOCATION OF RELEASE @

44 45 80 PERSONNEL EXPOSURES r::;;.,

NUMBER

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TYPE

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e ATTACHMENT (PAGE 1 OF 1)

SURRY POI.JER STATION, UNIT 1 DOCKET NO:

50-280 REPORT NO:

79-031/03X-l EVENT DATE:

11 /1 7 /79 (UPDATED REPORT)

TITLE OF EVENT:

Liquid Waste Release

1.

DESCRIPTION OF EVENT

While reviewing Liquid Haste Release forms, it was determined that on 11/17/79, a release was made which contained isotope activity summations greater than

1. SE-03 uCi/cc.

The Liquid Waste Radiation monitor did not alarm high and trip the release valve as required by Technical Specification 3. 7.E.

A release rate of 48 gpm was experienced over a period of 60 minutes.

2.

PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS:

The Liquid Waste Radiation monitor, on high activity (1. SE-03 uCi/cc),

provides a trip signal to the Liquid Waste Release valve.

Since the monitor can be calibrated to one

  • isotope only, administrative control disallows any releases which contain activity summations greater than
1. SE-03 uCi/cc.

The precalculations before release were done twice by two different individuals and both calculations were in error. Since the release did not exceed the lirni ts allowed by Technical Specification 3.11.A. 2 and 10 CFR 20, App.

B, the health and safety of the public were not affected.

3.

CAUSE

A personnel error caused this event.

4.

IMMEDIATE CORRECTIVE ACTION

A check of the waste releases was done for the month of November, to verify compliance with 10 CFR 20, App.

B.

5.

SUBSEQUENT CORRECTIVE ACTION:

Personnel were instructed to use more care in filling out release forms.

6.

ACTIONS TAKEN TO PREVENT RECURRENCE:

No further corrective action will be required.

7.

GENERIC IMPLICATIONS:

None.

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