ML20150E134

Submits Resolution Schedule for Human Engineering Discrepancy Identified as Part of 1984 Dcrdr.Based on Review of Hed 3.1.037, Annunciators W/Input from More than One Parameter, 14 of 207 Annunciators Should Be Modified

ML20150E134
Person / Time
Site:	Davis Besse
Issue date:	06/29/1988
From:	Shelton D TOLEDO EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
1537, TAC-56116, TAC-65255, NUDOCS 8807150011
Download: ML20150E134 (2)

Text

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TOLEDO'

%en EDISON A Certarur Energy Dmpany DONALD C. SHELTON Docket _No. 50-346 ff*,%'3 7 *"

License No. NPF-3 Serial No. 1537 June 29, 1988-Document Control Desk United States Nuclear Regulatory Commission Vashington, D. C.

20555 Subj ec t :

Human Engineering Discrepancy (HED) Resolution Schedule Gentlemen:

On' April.9, 1987, Toledo Edison (TED) submitted a plan to perform eleven Special Studies (Serial No. 1350) to-determine resolution for the 378 HEDs (tventy-nine of which vere categorized as safety-significant) identified as part'of the-1984 Detailed Control Room Design Reviev (DCRDR).

In order to complete this task, TED formed Special Study Teams (consisting of at least one licensed operator, human factors specialist, and system and design engineer) to evaluate each HED and identify the corrective actions necessary to resolve

'the specific concerns of the HED. These Special Studies are nov complete and the identified corrective actions have been scheduled for implementation.

The corrective actions identified by the Study Teams fall into three categories:

1) Those deemed necessary to resolve the 29 safety-significant HEDs,

2) Those deemed necessary to resolve operational concerns, and

3) Those deemed necessary to provide operational enhancements.

Those corrective actions deemed necessary to resolve the 29 safety-significant

-HEDs and the operational concerns are scheduled to be completed by the end of the fifth refueling outage (5RFO), vith the exception of two corrective actions for HED No. 3.1.037 discussed below.

The remainder of the corrective actions (i.e., those considered enhancements) are currently scheduled to be completed by the end of the sixth refueling outage (6RFO); although, sose may be implemented earlier.

The Annunciator Special Study Team evaluated HED No. 3.1.037, entitled "Annunciators with Input From More Than One Parameter- ", and determined 8807150011 880629 v0[

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. License No, NPF-3 Serial No. 1537 Page 2 that 14 of the 207 multiple input annunciators should be modified during the 5RFO such that they would "reflash" upon receiving a subsequent alarm signal.

However, TED later determined that it vould be necessary to defer two of the

'14.reflash modifications (i.e., reflash for the EHC CTRL PANEL and EHC CABINET alarms for~the turbine Electro-Hydraulic Control (EHC) System) until 6RF0.

The two reflash modifications needed to be deferred because discrepancies with the EHC. annunciator cchemes were identified'that vould preclude installation of the reflash modifications until.the field configuration of the EHC system could be modified. TED believes deferral of the two EHC reflash modifications is justified because:

1) The EHC System is not a safety system,

2) HED No. 3.1.037 has a safety-significance ranking of "Low",

1) The_ decision to implement.the two EHC reflash modifications was-based on operational versus safety considerations, and

4) Operational Procedures remain in place that provide Operator actions upon receiving the subject EHC alarms.

TED vill promptly. notify the NRC of any other unavoidable delays to this schedule.

Very tru

yours, CFM sag.

cci A. B. Davis, Regional Administrator A. W. DeAgazio, NRR/NRC, DB-1 Project Manager DB-1 Resident Inspector

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