ML20044C325

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Partially Deleted Ltr Responding to 910415 Allegation That Operator Not Initiating Plant Incident Rept After Circulating Water Pump D Tripped on 910413.Util Corrective Actions Appropriate.Related Info Encl
ML20044C325
Person / Time
Site: Millstone Dominion icon.png
Issue date: 12/13/1991
From: Wenzinger E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
AFFILIATION NOT ASSIGNED
Shared Package
ML16266A160 List:
References
FOIA-92-162 NUDOCS 9303220199
Download: ML20044C325 (12)


Text

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by DEC 13 1991 This letter refers to the concerns about Millstone Unit 2 you brought to our attention on April 15,1991 regarding the operators not initiating a Plant Incident Repon (PIR) after the

D circulating water pump tripped on April 13,1991; and, not energizing the spare boric acid pump motor windings and maintaining their temperature in accordance with preventive maintenance specifications while in the warehouse.

I These concerns were referred to Nenheast Utilities (NU) for their evaluation. A copy of their response is attached for your information. We have evaluated their response and i

determined that:

1 1.

Your concern about the failure to prepare the PIR was not substantiated. Millstone procedure ACP-QA-10.01, Plant Incident Report, speci5es a PIR is needed when an event requires the involvement of plant management or requires the issuance of a repon to an external agency. Following the pump restan, the on-duty shift supervisor a

decided the pump trip represemed neither a near miss nor a recurring equipment failure, thus a PIR was not required. A Trouble Repon was however prepared, and the need for a PIR was later discussed with the Unit Duty Of6cer and the Operations Manager, who agreed with the shift supe visor's determination.

t 2.

Y( v concern about the not maintaining the pump motor winding temperature was l

v.

-rion was initiated by NU to ensure that, in the future, the pump motor w'

11 be energized upon receipt in the warehouse, and the winding tempese will be maintained at the required temperature.

J We have concluded that these actions were appropriate, therefore, we plan no funher action and consider these concerns to be resolved.

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'l p7 We appreciate you informing us of your concerns and feel that we have been responsive.

1 Should you have any additional questions regarding these matters, please call me collect at l

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(215) 337-5225.

d Sincerely, C $A '

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d Edward Wenzinger, Chief i

t Reactor Projects Branch 4

Attachment:

(1) NU letter A09805 of September,27,1991 bec /w encl:

Allegation File: RI-91-A-0070 E. Conner's Sles W. Raymond/T. Shediosky Contractor's office files (Hunt)

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i EC131991 This letter refers to the concerns about Millstone Unit 2 you brought to our attention on April 15,1991 regarding the operators not initiating a Plant Incident Report (PIR) after the "D" circulating water pump tripped on Apnl 13, 1991: and, not energizing the spare boric acid pump motor windings and maintaining their temperature in accordance with preventive maintenance specifications while in the warehouse.

These concerns were referred to Northeast Utilities (NU) for their evaluation. A copy of their response is attached for your information. We have evaluated their response and determined that:

1.

Your concern about the failure to prepare the PIR was not substantiated. Millstone procedure ACP-QA-10.01, Plant incident Report, specifies a PIR is needed when an event requires the imohement of plant management or requires the issuance of a report to an external agency. Following the pump restart, the on-duty shift supenisor decided the pump inp iepresented neithe a near miss nor a recut:ing equipment failure, thus a PIR was not required. A Trouble Report was however prepared, and the need for a PIR was later discussed with the Unit Duty Officer and the Operations -

Manager, who agreed with the shift st enisor's determination.

2.

Your concern about the not maintaining the pump motor winding temperature was valid. Action was initiated by NU to ensure that, in the future, the pump motor windings will be energized upon receipt in the warehouse, and the winding temperature will be maintained at the required temperature.

We have concluded that these actions were appropriate, therefore, we plan no further action and consider these concerns to be resolved.

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2 We appreciate you informing us of your concerns and feel that we have been responsive, Should you have any additional questions regarding these matters, please call me collect at i

(215) 337-5225.

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7. -; F Edward Wenzinger, Chief Reactor Projects Branch 4 i

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Attachment:

(1) NU Ictrer A09805 of September, 27,1991 9

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i 77 We appreciate you informing us of your concerns and feel that we have been responsive.

1-Should you have any additional questions regarding these matters, please call me co!!ect at (215) 337-5225.

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d Sincerely,

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, -J BY l

Edward Wenzinger, Chief Reactor Projects Branch 4 i

Attachment:

(1) NU letter A09805 of September. 27, 1991 bec /w encl:

i Allegation File: RI A-C070 E. Conner's Gles W. Raymond/T. Shedlosky Contractor's of6ce files (Hunt) i t

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September 27, 1991 Docket No. 50-336 A09805 C

RE: Employee Concerns i

I Mr. Charles V. Hehl, Director Division of Reactor Projects i

U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, Tennsylvania 19406

Dear Mr. Hehl:

Millstone Nuclear Power Station. Unit No. 2

[

Rl-91-A-0070 i

have completed our review of identified issues concerning activities at Ve Millstone Station. As requested in your transmittal letter, our response contain any personal privacy, proprietary, or safeguards does not The material contained in these responses may be released to information.

J the public and placed in the NRC Public Document Room at your discretion.

The NRC transmittal letter and our response have received controlled and i

f limited distribution on a "need to knov" basis during the preparation of this response. Additional time in which to respond to these issues vas granted by the Region I Staff in a telephone conversation on. September 19, 1991 ISSUE 70-1:

During a recent condenser backvarhing evolution on April 12-13, 1991 the.

'I "C" circulating vater pump vas tripped by operators. Concurrently, the "D" circulating vater pump inadvertently tripped. A plant incident report was not vritten describing this event.

In addition, during the past. refueling outage (October 1990) a similar event occurred with no subsequent plant i

incident report.

Request:

Please ' discuss the validity of this assertion. If a plant incident report i

vas required, please discuss why one was not vritten.

Please discuss whether this incident has occurred previously, and if so, why it was not j

documented via a plant incident report.

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Mr. Charlos V. Hshl, Director t

U. S. Nuclear Regulatory Con:21ssion l

A09805/Page 2 September 27, 1991 Responae:

In stating that the

'D' circulating vater pump inadvertently tripped on t

i April 13, 1991, the assertion is valid.

In implying that a Plant Incident Report (PIR) vas required, the assertion is not valid.

Wr is the l

assertion valid in stating that a similar problem occurred in October 1990.

a 13, 1991 pump A plant incident report (PIR) vas not necessary.for the April trip as the pump v&s restarted and a trouble report was submitted to

[

the reason for the trip.

In reviewing Shift Supervisor (SS) t investigate i

logs from October 1990, ve find no record of a similar pump trip.

i program at Hillstone Station is controlled by Administrative l

J The PIB Control Procedure (ACP) ACP-0A-10.01 - Plant Incident Report. The purpose of the PIR is to document any situation that requires the involvement of i

The guidance given is j

plant management or reporting to an external agency.

a PIR should be initiated if in the judgment of a plant staff person, l

that action or ecgnizance is required to resolve the incident.

l management The underlying theme of the PIR procedure is succinctly phrased in the l

final sentence of Section 1 of the ACP: "If in doubt,-it is better to initiate a PIR than to allov a problem to go unattended." The decision to l

issue a PIR is sometimes clear cut (as in instances where PORC-approved j

4 procedures require that a PIR be written) but is f requently a ju gment call f

d on the part of the on-duty Shift Supervisor. The Shift Super isor is l

assisted in such decisions by the guidance in ACP-0A-10.01 and consultatfor.

4 l

vith the Operations Manager or the Unit Du:y Officer.

to the unexpected trip of the "D" cire. pump at 0025 on April 13, l

Relative 1991, there are two criteria given in the ACP which might apply:

J Any near miss that could have resulted in a plant trip / scram...

d.

that have a significant effect on l

Recurring failures of plant equipment l

e.

l plant reliability or operability.

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j Clearly these tvc criteria involve judgment on the part of the Shift i

j Supervisor, and it is reasonable for the Shift Supervisor on the mid-shift on April 13,

1991, to have decided against a PIR, and to ask the Duty l

A l

Of ficer and Operations Manager in the morning whether a PIR vas desired.

Trouble Report (TR) on the condition was submitted, and the pump trip vas l

l discussed with management the folloving morning. In response to the TR, a l

faulty timer was identified and corrected by Generation Test Services.

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Rackground:

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i of 1990, Generation Test Services, during routine In the refuel outage

testing, identified a bad timer in the

'D' cire. pump.

The timer was timers vere si n ting to fail, replacement timers and since the j

repaired The timers ordered in late 1990 vere received in the spring l

f ailed in the C pump in ordered.

vere of 1991 and one was used to replace the timer that i

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.Mr. Charlcs V. Echl, Director

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  • U. S. Nuclear Regulatory Commission A09805/Page 3

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September 27, 1991 carly April 1991.

Vendor information concerning an expected 10-year i

e the order, resulted in our service life which was provided in response to ensure that these timers establishing a preventive maintenance program to are replaced after being in service for 8 years.

ve vere aware of the pump trip at issue ve vere not aware that this

.i Vhile vas a concern until receipt of the NRC transmittal letter.

I ISSUE 70-3b:

i i

was noted, during a preventive maintenance on the spare boric acid pump It located in the varehouse, that the motor heaters vere not energized i

above ambient as is required on motorkeep the vindings at least 5 degrees F to the PH card.

Requests discuss the validity of this assertion.

Please discuss actions Please in storage.

taken to ensure the proper performance of PHs on equipment

Response

The assertion as stated is valid. Ve vere informed of this issue via a on the preventive maintenance (FM) Automated Vork Order (AVO) which vas completed on April 4,

1991. The note indicated that the PM vas note not 5 F above the unsatisfactory because the motor casing temperature vas ambient temperature due to the fact that the motor heaters were not t

l energized.

On April 8, 1991, an AVO vas generated to make the necessary connections to f

The work t

the motor heaters for the spare boric acid pump motor.

The delay.in completing the vork'resulted' l

energize completed on May 30, 1991.

moving the motors near enough to a power source that could be used to was from energize the heaters.

performed on the spare boric.

the July 3, 1991, preventive maintenancethe motor had been relocated, the so, tor

's For acid pump motor (AVO M2-90-16027),

completed satisfactorily with no

-f heaters vere energized and the PH vas outstanding items.

When equipment such as the pump in question is received on site it is stored in varehouse facilities qualified for storage of Category I f

with the requirements of ACP-0A-4.04-electrical equipment in accordance Instructions for Packaging, Shipping, Receiving, Storage, and Handling.

l t

Equipment is placed in the PH program to ensure that the proper maintenance service. That the vindings were not carried out until it is placed in l

an isenergized as soon as the pump vas received and placed in storage was l

oversight which vas corrected by the PM program.

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Mr. Charles V. Bahl, Director j

~ "U. S. Nuclear Regulatory Commission A09805/Page 4

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f September 27, 1991 The resistance readings recorded during each of the PM activities indicated jl that the motor insulation resistance was within specifications.

Based on i

the storage environment and the insulation resistance readin;s, there is reasonable assurance'that there was no deleterious effect on the motor from stored with its motor heaters de-energized. As can be seen from the we completed all appropriate actions to ensure -the l

being above chronology, of the boric acid pump prior to receipt of your letter on this l

operability l

zatter.

l After our review and evaluation of this issue, we find that these issues t

i did not present any indication of a compromise of nuclear safety.

Ve f

appreciate the opportunity to respond and explain the basis of our actions.

Please-contact my staff if there are further questions on any of these

]

i catters.

Very truly yours,

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NORTHEAST NUCLEAR ENERGY COMPANY l

$UVW E. J. M y'cika 47 Senior Vice President l

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V.

J. Raymond, Senior Resident Inspector, Millstone Unit Nos.

1, 2, l

t and 3 E.

C. Venzinger, Chief, Projects Branch No.

4. Division of Reactor i

Proj ec ts E. H. Kelly, Chief, Eeactor Projects Section 4A l

J. T. Snedlosky, NRC, Hillstone Nuclear Power Station t

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.i TELEPHONE 00!NERSATION WITH

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DATE: April 12, 1991 l

TIME: 4:00 p.m.

called the resident office to inform the

.l 2ng or, that he was notified (April 11) that it was a federal offense to be notified, and relay safeguards information without safeguard clearance.

Mgstated that it was not his intention or was it deliberate to relay information, since he was unaware that his safeguards clearance was removed, when he was layed off.

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states that he is worried about the accusation,.

and scared to a certain extent.

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@ that previously he would relay complaints and concerns from the guard force to the NRC.

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~i believes that the initiation of the accussation of the l

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Northeast Utilities.

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Te one cont 1300, 5/1/91, 3 minutes Mr. Keimig stated that he was calling to discuss his contact with the resident office on April 12 and April 17; v

h[cannot nor will not discuss issue with us (Keimig & Stewart),

stated his 5th Amendment right to silence.

NRC residents are " stupid", " arrogant",

a blatant conspiracy exists, his call back was insufficient f

re i e t?)

This is a serious matter, a conspiracy of two people getting together to " shut him up".

Mr. Raymond has information on " serious information"

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orig to RI-91-A-0071 i

copies:

Wiggins Stewart Kelly Wenzinger Keimig l

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RI-91-A-0071 Telephone conversation:

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. with k 5 / +! [Q Millstone 1300, 5/1/91, 3 minutes Mr. Keimig stated that he was calling to discuss his contact with the resident office on April 12 and April 17t C{L jeannot nor will not discuss issue with us (Keimig & Stewart),

stated his 5th Amendment right to silence.

NRC residents are " stupid", " arrogant",

a blatant conspiracy exists, his call back was insufficient Mk MM'MiFMM]for his Union.

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has tapes of conversations, (w/ resident?)

This is a serious matter, a conspiracy of two people getting together to " shut him up".

Mr. Raymond has information on " serious information" r

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J sltf91 orig to RI-91-A-0071 copies:

Wiggins Stewart Kelly Wenzinger

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