ML20150B545
| ML20150B545 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 03/10/1988 |
| From: | Kane W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Carey J DUQUESNE LIGHT CO. |
| Shared Package | |
| ML20150B549 | List: |
| References | |
| EA-88-083, EA-88-83, NUDOCS 8803170044 | |
| Download: ML20150B545 (3) | |
See also: IR 05000334/1988012
Text
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MAR 101988
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Docket No.
50-334
License No. OPR-66
EA No.
88-83
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Duquesne Light Company-
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ATTN: Mr. J. J. Carey
Senior Vice President
Nuclear Group
,
Post Office Box 4
Shippingport, Pennsylvania 15077
,
Gentlemen:
,
9
Subject: Eeaver Valley Unit 1 Special Inspection No. 50-334/88-12
,
The enclosed report transmits the findings of the March 3-8, 1988 special
inspection concerning the startup and operation of Beaver Valley, Unit 1 out-
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side the limits of the Technical Specifications. These findings were discussed
by Mr. J. Beall and Mr. S. Pindale with you and members of your staff on
March 8, 1988.
On March 3,1988, the NRC was informed of the discovery that two of the four
high-high containment pressure channels had not been operable during operation
due to the placement of the associated bistables in the bypassed condition.
This left only the two remaining channels available to automatically start the
safety systems designed to suppress,the large pressure rise inside the Reactor
Containment Building that' would result from a high energy line break.
This
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condition involved exceeding a Limiting Condition for Operation (LCO), which
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requires a minimum of three operable channels for this function, for approxi-
mately eight days. Operation outside this LCO placed the unit'in the condition
wherein the single failure of one of the remaining two channels would have
,
prevented the automatic actuation (two trip signals needed) of the safety
systems required to mitigate high energy line break accidents.
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We are concerned with this apparent fa
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which impact the operability of safety s,ilure to adequately ~ control activities
ystems. Accordingly, we have scheduled
an Enforcement Conference'on March 24, 1988 to discuss this event with you in
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NRC Region I Offices in King of Prussia.
We will forward an appropriate
notification of enforcement action after the enforcement conference.
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OFFICIAL RECORD COPY
IR BV1 88-12 - 0001.0.0
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8803170044 690310
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03/10/88
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ADOCK 05000334
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Duquesne Light Company
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During
the
Enforcement Conference,
please
be prepared
to address
the
following:
Safety significance,
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Root cause evaluation,
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Factors that worsened or mitigated the event,
--
Broader implications of this event,
--
Actions to prevent recurrence, and
--
Matters listed in Section 6 of the enclosed report.
Thank you for your cooperation.
Sincerely,
craginal SI nsd 1 2
/
William F. Kane, Director
Division of Reactor Projects
Enclosure:
NRC Region I Inspection Report No. 50-334/88-12
cc w/ encl:
J. D. Sieber, Vice President, Nuclear Group
J. O. Crockett, Senior Manager, Nuclear Operations
N. R. Tonet, Manager, Nuclear Engineering
C. E. Ewing, QA Manager
W. S. Lacey, Plant Manager
K. D. Grada, Manager, Nucitar Safety
Public Document Room (PDR)
local Public Document Room (LPOR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector
Commonwealth of Pennsylvania
i
0FFICIAL RECORD COPY
IR BV1 88-12 - 0002.0.0
03/10/88
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Duquesne Light Company
3
MAR 101988
bcc w/ encl:
Region I Docket Room (with concurrences)
Management Assistant, DRMA (w/o enclosures)
W. Russell, RI
J. Allan, RI
J. Gutierrez, RI
D. Holody, RI
S. Collins, RI
J. Wiggins, RI
L. Tripp, RI
D. Limroth, RI
R. Bores, RI
J. Durr, RI
R. Gallo, RI
C. Anderson, RI
J. Lieberman, OE
F. Miraglia, NRR
P. Tam, LPM, NRR
J. Goldberg, OGC
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0FFICIAL RECORD COPY
IR BV1 88-12 - 0003.0.0
03/10/88