ML20238C191
| ML20238C191 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/15/1987 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Kane W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-7-213, NUDOCS 8712300108 | |
| Download: ML20238C191 (4) | |
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m WMW (412) 64}5200 Beaver Vehey No. 2 Unit Project Organization Te6ecopy (412) 64}5200 Ext.160 S.E.G. Building P.O. Box 328 Shippmgport, PA 15077 United States Nuclear Regulatory Commission December 15, 1987 Region I 2NRC-7-213 631 Park Avenue King of Prussia, PA 19406
/iTTN:
Mr. Villiam F. Kane, Director Division of Reactor Projects
SUBJECT:
Beaver Valley Power Station Unit No. 2 Docket No. 50 412/ License NPF-73 Inspection Report 50-412/87-56 REPERENCE:
Letter dated September 16, 1987 (V. F. Kane to J. J. Carey)
The above referenced letter transmitted to Duquesne Light Company (DLC) the
" Operational Readiness Assessment Team Inspection Report 50-412/87-56" for Beaver Valley Power Station, Unit 2.
program at BVPS-2 to reduce the number The letter noted the existence of a of unnecessary alarms in the control room and requested DLC to provide a description of the program and its results by December 15, 1987. The DLC response to that request is contained in the attachment to this letter.
DUQUESNE LIGHT COMPANY h&
SeniorVifePreside(/
W. d. farey nt Attachment ce; Mr. P. Tam, Project Manager (v/a)
Mr. J. Beall, NRC Sr. Resident Inspector (w/a)
INPO Records Center (v/a)
NRC Document Control Derk (v/a) 8712300108 87323c hDR ADOCK 05ooo477 DCD O'
l i
ATTACHMENT Response to Inspection Report 50-412/87-56 At the time of NRC Inspection 50-412/87-56, which was completed on August 7, 1987, BVPS-2 had an ongoing effort in place tc reduce the number of alarmed conditions in the control room.
This effort was being performed by Operations personnel.
To expedite this effort, and approach the " black-board" concept during normal plant operations, a task force consisting of representatives from Operations Support and Engineering was formed in late August, 1987. The task force's goal was to investigate all illuminated annunciator vindows in the control room and to reduce this number to as few as possible consistent with providing the control room operators with all necessary operating informatv:
A " snap shot" of all illuminated annunciator vindows was taken on August 26, 1987 at which time a total of 77 vindows were in alarm. Collectively, the subject 77 windows had 503 inputs capable of alarming them and 152 points were found to be in alarm. Each alarmed input was then evaluated and responsibility was assigned to appropriate department representatives on the task force for follow-up investigation and providing recommended resolutions.
The original 77 illuminated annunciator vindows, four additional annunciator vindows (which vent into alarm after August 26, 1987 and vere added to the program at Operations request) and their associated alarmed inputs were placed in a computer data base so each could be tracked. The task force then conducted weekly meetings with Plant and Engineering management during which proposed actions to eliminate the illumination of the subj ect annunciators, where appropriate, vere discussed.
These meetings continued through September 30, 1987.
Although the reasons found for the annunciators being in alarm were varied, most can be characterized by one of the following:
A.
Instrument; tion problems resulting in false annunciations B.
Equipment hardware problems actually resulting in an "off-normal" condition for the annunciated variable C.
Ongoing plant testing which resulted in annunciator alarm setpoints being exceeded due to required test conditions.
D.
Systems not in use at the time which resulted in the associated annunciator setpoints being in alarm.
E.
Annunciator alarm setpoints which were determined to be overly restrictive.
Since SeptemLer 30, 1987 members of the task force have continued to work on rasciving the cutst nding problems requiring resolution to clear the alarmed annunciators. Through November 15, 1987, 48 vindows consisting of approximately 89 previously alarmed points have been cleared.
Of these, 11 windows have been cleared by disabling 18 of their associated inputs which were in alarm. These Page 1 of 2
q..,
Response to Inspection Report 50-412/87-56 inputs were from systems not in service or from systems / equipment whose annunciator inputs vill be controlled by administrative procedure.
As the systems not in service are returned to service, the associated inputs vill be reenabled.
Similarly, administrative procedures vill require the reenabling of disabled annunciator inputs under operating conditions for which those inputs do provide a meaningful alarm (e.g.
certain refueling related annunciators which are only valid during refueling operations).
These 11 vindows have been
" caution" tagged to alert the operators that one or more inputs to the vindows have been disabled.
The task group continues to track the 33 windows which remain illuminated and the 11 " caution" tagged vindows. Problems with the inputs to these vindows have been identified and responsibilities for clearing the alarmed inputs have been assigned to the appropriate department (s). The Operations Support group members of the task force are coordinating these activities with the other departments This activity vill continue until all presently tracked items are as necessary.
satisfactorily resolved.
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