ML20196A347
| ML20196A347 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 06/16/1999 |
| From: | Kozak T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Mcelwain J ILLINOIS POWER CO. |
| References | |
| 50-461-99-11, NUDOCS 9906220196 | |
| Download: ML20196A347 (2) | |
See also: IR 05000461/1999011
Text
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June ~16, 1999
i
i Mr. John P. McElwain '
Chief Nuclear Officer
<
. Clinton Power Station
Illinois Power Company
Mail Code V-275
4
P. O. Box 678
Clinton,IL 61727'
SUBJECT: NOTICE OF VIOLATION (CLINTON INSPECTION REPORT 50-461/99011(DRP))
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Dear Mr. McElwain:
This will acknowledge receipt of your letter dated May 28,1999, in response to our
. letter dated April 30,1999, transmitting a Notice of Violation associated with inspections
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Report 50-461/99011.' We have reviewed your corrective actions and have no further questions
at this time. These corrective actions will be examined during future inspections.
Sincerely,
/s/ T. Kozak
Thomas J. Kozak, Chief .
Reactor Projects Branch 4
Docket No. 50-461
License No. NPF-82.
,
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cc:.
G. Hunger, Station Manager
.
R. Phares, Manager, Nuclear Safety .
and Performance improvement
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J. Sipek, Director - Licensing
cc w/itr dtd 5/28/99:
M. Aguilar, Assistant Attorney General
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G. Stramback, Regulatory Licensing
'
Services Project Manager
General Electric Company
.
Chairman, DeWitt County Board
. State Liaison Officer
' Chairman, Illinois Commerce Commission
DOCUMENT'NAME: G:\\CLi \\CLl99011.TY
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Distribution w/itr dtd 5/28/99:
Project Mgr., NRR
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J. Caldwell, Rlli
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SRI Clinton
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liknois Power Company
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P.O Boe 678
Chnton. lL 61727
Tel 217 935 8881 x3900
Fax 217 935-4632
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John P. McElwain
Chief Nuclear Officer
P9WER
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An tilinova Company
May 28, 1999
Docket No. 50-461
Document Control Desk
Nuclear Regulatory Commission
Washington, D.C. 20555
Subject:
Response to Notice of Violation Contained
in Inspection Report 50-461/99011(DRP)
Dear Madam or Sir:
The attachment to this letter contains the Clinton Power Station (CPS) response
to the Notice of Violation of Nuclear Regulatory Commission (NRC) requirements
documented in NRC Inspection Report 50-461/98011 (DRP). CPS admits that the
violation occurred.
CPS believes that the actions described in the attached response addresses the
concerns identified in the Notice of Violation.
Sincerely yours,
$40-
if-
k John P. McElwam
ChiefNuclear Officer
MRS/krk
Attachment
cc:
NRC Clinton Project Man;ger
NRC Resident OfIice, V-690
Regional Administrator, Region III, USNRC
Illinois Department of Nuclear Safety
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Attachment
to U-603213
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Page1of2
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Response to Notice of Violation 50-461/99011-02
. The violation states in part:
"10 CFR Part 50, Appendix B, Criterion XVI, " Corrective Actions," states, in
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part, that measures shall be established to assure that conditions adverse to quality,
such as failures, malfunctions, de6ciencies, deviations, defective material and
equipment, and nonconformances are promptly identified and corrected.
10 CFR Part 50, Appendix B, Criterion III, " Design Control," states, in part, that
measures shall be established to assure that applicable regulatory requirements and
the design basis as speci6ed in the license application, for those structures,
systems, and components to which this appendix applies are correctly translated
into speci6 cations, drawings, procedures, and instructions.
Contrary to the above, as of April 9,1999, the licensee, despite having considered
the issue closed in its corrective action program, had failed to correct a condition
adverse to quality. This resulted in an erroneous design value being maintained in
a design basis calculation and correspondingly, a continuing violation of Criterion
III. Specifically, on July 2,1997, the NRC informed the licensee that they had not
established measures to translate the horsepower rating of the hydrogen mixing
compressors into design basis load calculation 19-AK-05, Revision 5, " Calculation
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for Diesel Generator Load Monitoring." The licensee documented this issue in
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their corrective action system and closed the issue when they believed corrective
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actions were implemented. Subsequent NRC inspections concluded, despite the
closure in licensee's corrective action system, that the licensee had not correctly
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translated, as of April 9,1999, the horsepower rating of the hydrogen mixing
compressors into the design calculations for loading of the emergency diesel
generator."
Backaround and Reason forViolation
Condition report 1-97-07-105 identified that the horsepower requirements for the
g6 ogen mixing compressors were greater than the horsepower used in the calculation
performed to determine the maximum room temperature ofequipment in the hydrogen
mixing compressor room. This calculation is used to support the environmental
qualification of equipment in the hydrogen mixing compressor room. The use of the
incorrect horsepower for the hydrogen mixing compressor in the calculation was
discovered during resolution of the concerns with degraded offsite electrical power supply
voltage. The corrective actions for condition report 1-97-07-105 identified several items
that may need to be changed to correct the error in the horsepower requirements of the
hydrogen mixing compressors. The potential items impacted included, surveillance
procedures, Updated Safety Analysis Report, and some calculations. The change to the
diesel generator loading calculation was evaluated as part of one of the corrective actions
for the condition report.' However, the resolution to the condition report did not identify
that calculation 19-AK-05 " Calculation for Diesel Generator Load Monitoring" needed to
be revised to correct the horsepower requirement error for the hydrogen mixing
compressors.
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Attachment
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to U403213
Page 2 of 2
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Calculation 19iAK-05 was revised as part of the resolution of the degraded offsite voltage
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project; however, the new revision did not include changes to the horsepower
requirements for the hydrogen mixing compressors. Investigation revealed that individuals
revising and reviewing the revision to calculation 19-AK-05 were aware of the need to
p change the horsepower requirements for the hydrogen mixing compressors because of
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previous verbal communication, but apparently forgot to revise the calculation to reflect
the horsepower change. The need to revise calculation 19-AK-05 was not formally
documented, and the calcula: ion revision was being performed as part of a larger scope of
work for the degraded offsite voltage project. The reason for the violation is that during
the resolution ofcondition report 1-97-07-105, the individual that identified the
calculations affected by the change in horsepower requirements for the hydrogen mixing
compressors failed to identify calculation 19-AK-05 as requiring revision. Since
calculation 19-AK-05 was not identified as requiring revision, it was not included as a
calculation requiring revision in the resolution to condition report 1-97-07-105.
/
Corrective Steos Taken and Results Achieved
.
Calculation 19-AK-05 " Calculation for Diesel Generator Load Monitoring" was revised
using the correct horsepower for the hydrogen mixing compressors. A review was
performed to identify if there were any other calculations impacted by the change to the
horsepower requirements for the hydrogen mixing compressors that were not identified
during the resolution ofcondition report 1-97-07-105. This reviewidentified several
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other electrical calculations that require revision that were not listed as impacted in
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condition report 1-97-07-105. These revisions will be completed as part of the corrective
action to condition report 1-99-07-105.
Correedve Steos to Avoid Further Violations
)
- Since 1997, when the problem with the incorrect horsepower for the hydrogen mixing
compressors was identified, the impact review process for calculations has been improved.
' A revision to Nuclear Station Ragia-ing procedure E.1 Calculation has been completed
which revised the process for coaWing Calculation-Impact Assessments. Review of this
new process concludM that the new process is adequate and most likely would have
identified that calculation 19-AK-05 required revision to change the horsepower
requirements for the hydrogen mixing compressors.
Date when Full Comoliance Will Be Achieved
Clinton Power Station is in full compliance with 10 CFR 50, Appendix B, Criterion XVI
. and Criterion III, with regards to the failure to revise diesel loading calculation 19-AK-05
for a change to the hydrogen mixing compressor horsepower.