ML20065Q195

Responds to NRC Providing Conclusion That Dcrdr Requirements,Per Suppl 1 to NUREG-0737,met.Listing of Human Engineering Discrepancies for Which Corrective Actions Completed Encl

ML20065Q195
Person / Time
Site:	Beaver Valley
Issue date:	12/03/1990
From:	Sieber J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-NUREG-0737, RTR-NUREG-737 TAC-62879, NUDOCS 9012170003
Download: ML20065Q195 (3)

Text

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-0. S. Nuclear Regulatory Commission Attn Document control Desk

i_; Washington,- DC 20555

Reference:

Beaver Valley Power Station, Unit No. 2 r Docket No. 50-412, License No. NPF-73 Detailed Control Room Design Review Response to NRC Safety Evaluation (TAC 62879) and closure-of License Condition 2.C.gd)

Gentlemen:

This letters is in response to the NRC's letter dated November 6, 1990,_ which ;provided the _NRC staff's conclusion that the Detailed

-Control Room Design Review (DCRDR) requirements as specified in Supplement 1 to NUREG-0737 are met for the Beaver Valley Power Station Unit No. 2 (DVPS-2).

As requested- in .the 'NRC's letter, Duquesne Light Company is

-informing the:-Commission that all DCRDR correceive and other actions

, 'have_ been _ implemented prior to the start-up following the second-BVPS-2 refueling outage. These actions were identified by the p- License Condition 2.C.(8) included in the Facility Operating License t Amendment No. 16 (TAC. No. 72001). The attachment to this letter providos' a listing of the Human Engineering Discrepai.cies (HEDs) for which the . corrective and other actions were completed according to

. Amendment No. 16 ', The attachment also includes the results of the other actions and any additional corrective actions determined feasible to satisfy the_HED were also implemented. Consequently, the

'complation of these actions provides- closure for the open issues

identified in License- Condition 2.C. (8) and the BVPS-2-DCRDR.-

If you have any questions in this regard, please contact my office'.-

Sincerely,

. D. Sieber Vice President Nuclear Group Attachment 000002- /

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cc: Mr. J. Beall, S". Resident Inspector Mr. T.-T.- Martin, NRC Region I-Administrator 1Mr. A. W. DeAgazio, Project Manager INPO Records Clerk 9012170003 901203 PDR ALOCK 05000412 3

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, ATTACHMENT

, BVPS-2 DCRDR Implementation of HED Actions This attachment provides the status of the HEDs identified in Table 1 of the Safety Evaluation attached to Amendment 16 of the BVPS-2 Facility Operating License No. NPF-73. The corrective and other actions for the HEDs were approved for delayed implementation and have been- implemented prior to the start-up following the BVPS-2 Second Refueling Outage. The HEDs are listed below and information for c.'aluative actions approved by Amendment 16 is included to complete closure. All actions were implemented in accordance with Amendment 16 except for the slightly over one month delay to 'ipgrade the postings for radio exclusion areas. This action was completed as documented in our' letter dated August 7, 1989.

HED NO. TITLE 2C1C-5514 Digital Radiation Monitoring System Printout 2MCR-0202 Communications Console / Merge Switch 2MCR-0203 Walkie-Talkie Communicationn Systems (1) 2MCR-0001 Control Room Noise / Computer Fan Replacement /HVAC Improvements Study (2) 2MCR-0002 Radiation Monitor System / Cabinet Fan Replacement (2) 2MCR-0008 HVAC System Air Flow Adjustments (2) 2MCR-0009 2MCR-0019 Emergency Lighting 2ES -0020 2AB*-0021 2V**-2128 Annunciator " Dark Board" (1) The outstanding action for HED 2MCR-0203 was to evaluate the operation of the Walkie-Talkie systems and factor the results into any design changes. (

References:

Letters to NRC dated March 9, 1989, April 20, 1989 and August 7, 1989). The purpose of the evaluation was to improve Walkie-Talkie communications primarily in areas where concrete shielding to radio transmission is an obstacle, i.e. inside containment. During the evaluation, the following actions were taken:

• Radio exclusion area postings were reviewed and upgrades implemented.

The Operating Manual Chapter on communications was revised to include the upgraded posting information on the restricted use of Walkie-Talkies.

-Xttcchmsnt, continued

., 'BVPS-2 DCRDR '

,jlpplementationLof HED Actions *

~:Page 2-i Information on radio signal transmission and radio frequency  ;

interference (RFI) _w as reviewed. _

The information which includes utility experience indicates that RFI is generated-for a wide band width from high (20 M'lZ) through very high and ultra-high frequencies. Each band width has its own particular transmission problems. Therefore, we have determined _ that RFI cannot be precluded for Walkie-Talkio use especially in areas near instrumentation.

• RFl _was ~ demonstrated at three MHZ levels for repeater  !

station use inside the BVPS-1 Containment., The_ repeater ,

station > was tied to the Control Room via a telephone pair.

The highest' (450 MHZ) level was tested a three power levels (0.25., _ 5, and 1.5w). All power + levels tested also

. exhibited RFI with instrumentation. This information was evaluated-and determined applicable to the BVPS-2. .

Based on1 the above results, we have determined that design changes to the. Walkie-Talkie Systems is not warranted.

Therefore, Lwe have . closed out further action to overcome the obstacle problems. with Walkie-Talkie communications pritaarily.

because: of the safety concerns related to- RFI with inscrumentation.

, (2) The outstanding action- for .HEDs 2MCR-0001 and 0002 was to evaluate- the feasibility of the recommended improvements concerning - HVAC- equipment and airflow noise.and the Radiation Monitoring ' System (RMS)_ Cabinet Fan noise. .The evaluation was

, completed- and- a design' change implemented. The design change replaced 'tho' RMS-cabinet-fans, reduced'the air velocities in the Control Room duct Work and added-additional' screen openings to

.the return -air- ductwork.-

Please note that.the installation of sound absorbing material ~ LinE the RMS cabinets is not feasible.

Therefore, iwo have returned to -the initially- recommended corrective action .of replacing the cabinet fans.- As_part of1the design _ change, the air flow adjustments were.made to satisfy HEDs -

2. McR-0008'~ -and 0009. These actions 1resulted in a~ reduction from 80 dB: to 67 dB at the RMS cabinets and readings between the Vertical- Board and Bench Board and in-front of-the Bench Board under-65 dB.

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