ML20091Q978
| ML20091Q978 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 06/04/1984 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| ULNRC-840, NUDOCS 8406140219 | |
| Download: ML20091Q978 (3) | |
Text
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- U NION ELECTRIC COM PANY 1908 ORATIOT STREET ST. Louis, Missouri
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June 4, 1984
,,, o Mr. Harold'R. Denton, Director Office.of' Nuclear Reactor Regulation
. U.S. Nuclear. Regulatory Commission Washington, D.C. 20555 ULNRC-840
Dear Mr. Denton:
-READINESS FOR FUEL LOAD
-CALLAWAY PLANT b
'Over the weekend of June _1-3, 1984,'while performing surveillance tests in preparation for fuel load, the following
-unplanned events took place at the Callaway Plant:
1.
~ Unintentional closing of RHR pump suction valves with pumps'in operation (pumps were immediately tripped with no apparent damage sustained);
2.
Three' instances which initiated spurious safety injection system actuation signals; and
- 3.
An incorrect valve lineup in the ESW system during; restoration from the' safety injection.
signal which allowed service water'to be transferred from the cooling tower basin to the ultimate. heat sink retention pond.
All of the above events appear to have been caused by inadvertent actions'of instrument and. control technicians and control room operators.
These events have been discussed with the NRC Resident Inspector and will be documented on incident reports in accordance_with site procedures.
_ Based on.my' preliminary review of these events, it appears that the^ mistakes of technicians and operators were caused primarily by-the high level of activity which prevailed in the plant control room.
In preparation for fuel load, we had a number of simultaneous activities underway which burdened control room personnel and others involved in surveillance testing to the point of impacting their proficiency.
To alleviate this situation, we have taken the following actions khkO a
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- Ar. Harold R. Denton
' June. 4, '198 4 '
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-Page 2
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- 1.. -Temporary suspension of post fuel load work 4
activities to reduce the need for work request approvals and system tagging which directly
. impact control. room personnel; 12.
- Reduction of temporary plant modifications remaining >from the preoperational test program which can be a~ source of confusion for plant operators; 3..: Review'and close out of all unnecessary
.t
~ workmen's protection tagging associated with gj completed work.
gr InLaddition, we have' increased supervision and support of sinstrument and control technician activities,-with'particular attentio: to personnal qualifications for.each task undertaken.
. Finally,'we'have: reduced. overtime.for Operations Department personnelito: levels prescribed by Section 6.2'.2.f of'the. Plant
~
t Technical Specifications.
LThese steps.have stabilized, personnel actions and reduced
.,5" Tactivities within the control. room, thQs~ allowing surveillance testing to proceed.with a reduced risk of personnelierror.
. Based 3
3'.
,on these. events and our corrective actions, I-estim' ate that our-o:
Lreadiness torload fuel will;be delayed.for a' period of.a few days
?to onelweek.
Consistent'.with-this schedule, I_ request'the OperatingLLicense be issued no later than; Thursday, June.7.
f}4, Veryftrulytyours,.
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Donald F.
Schnell.
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'cc : : Mr.-James G. Keppler Messrs. W. E. Corneliusi E. K. Dille
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'O STATE OF MISSOURI..)
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Donald.F. Schnell, of lawful age, being first duly sworn
- upon ' oath says that he' is Vice-~ President-Nuclear and an of ficer of Union Electric Company; that he.has read the foregoing document and knows the. content thereof; that he has executed the same for and on behalf of said = company with ' full power and authority to do so; and that the facts therein stated are. true and correct to the best of his knowledge,.information and belief.
By
[
Donald F.
Schnell Vice President Nuclear SUBSCRIBED and sworn to before me this h day of 198I BARBARA J PFA NOTARY PUBUC, STATE OF MISSOURI Mt COMMIS$?ON EXPlRES APRIL 22,1985 SI LOUIS COUNTY t
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