ML18004A559

Forwards Results of Preliminary Control Room Surveys,Per Crdr Final Summary Rept,Section 6.1.3.2.Surveys Not Conducted During Crdr Assessment/Reassessment Phase Due to Const Activities in Control Room

ML18004A559
Person / Time
Site:	Harris
Issue date:	09/29/1986
From:	ZIMMERMAN S R CAROLINA POWER & LIGHT CO.
To:	DENTON H R Office of Nuclear Reactor Regulation
References
NLS-86-373, NUDOCS 8610070453
Download: ML18004A559 (17)

Text

REGULA Y INFORi~)ATION, DISTR IBUTI'STEN (P, IDS)ACCESSION NBR: 8610070453 DOC.DATE: 86/O'V/29 NOTARIZED:

NQ DOCVET FAG IL: 50-400 Sheav on Hav v is Nuclear Power Planti Unit ii Cav olina 05000400 AUTH.NAl lE AUTHOR AFFILIATION ZINl'lERNAN>

S.R.Cav olina Power h Light Co.RECIP.NAI'lE RECIPIENT AFFILIATION DENTQN>H.R.Office of Nuclear Reactor Regulation.

Direc tov (post 851125

SUBJECT:

Forwards results oF pv eliminarg contv ol room surveys.per CRDR Final Summav g Rept'ection 6.l.3.2.Suv vegs not conducted during CRDR assessment/v'eassessment phase due to const activities in control room.DISTRlBUTIQN CODE: A003D COPIEB RECEIVED: LTR ENCLSIZE: TITLF: QR/Licensing Bubmi t ta l: Sup p I 1 to NUREQ-0737 (Gener i c Ltr 82-33)NOTES: Application Fov pevmit v eneural+iled.05000400 REC IP IENT ID CODE/NANE PWR-A ADTS PWR-A EICSB PWR-A PD2 LA BUCNLEY>B PWR-A RBB INTERNAL: ADll/LFNB NRR BWR ADTB NRR PWR-B ADTS EIB REQ FILES EXTERNAL: LPDR NBIC CQPIEB LTTR ENCL 1 2 2 1 1 1 1 0 1 1 1 1 1 1 1 RECIPIENT=ID CODE/MANE PWR-A EB PWR-A FOB PWR-A PD2 PD PWR-*PSB IE/DEPER/EPB NRR PAULSQNi W NRR/DSRO ENRIT NRR/DSRO/RSIB RGN2 NRC PDR COPIES LTTR ENCL 1 1 1 7 7 1 3 3 1 1 1 1 1 TOTAL NUNBER OF COP IEB REQUIRED: LTTR 31 ENCL 30 E~'4 h 1 SNK Carolina Power&Light Cotnpany SEP89)986 SERIAL: NLS-86-373 Mr.Harold R.Denton, Director: Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO.1-DOCKET NO.50-000 CONTROL ROOM DESIGN REVIEW-PRELIMINARY CONTROL ROOM SURVEYS

Dear Mr.Denton:

Carolina Power dc Light Company hereby submits the results of preliminary Control Room surveys as committed by Section 6.1.3.2 of the Shearon Harris Nuclear Power Plant Control Room Design Review (CRDR)Final Summary Report.The four Control Room surveys consist of the following:

Ambient Noise Illumination Control Room Environment (HVAC)Communications Due to construction activities in the Control Room, these surveys could not be conducted during the CRDR assessment/reassessment phase.Per discussions with Dr.S.N.Saba of your staff, preliminary surveys of these items were conducted as an interim measure to ensure that no gross inadequacies exist until the surveys could be conducted under normal plant operating conditions.

These preliminary surveys have been completed with no substantial inadequacies found (results are attached).

Final surveys of these four items will be conducted prior to the first plant refueling outage.Please note that major portions of the preliminary surveys were conducted prior to the installation of carpeting and the final placement of furniture in the Control Room.It is believed that these changes do not adversely impact the preliminary survey results and in many instances may prove to be of benefit.Should you have any questions with regard to this issue, please contact Mr.Arnold Schmich at (919)836-8759.8610070453 860929 PDR ADOCK 05000400 A..PDR.A WS/bmc (5013A WS)Attachment Yours very truly,~~S..Zim erman ager Nuclear Licensing Section cc: Mr.B.C.Buckley (NRC)W/A Mr.G.F.Maxwell (NRC-SHNPP)

W/A/Dr.3.Nelson Grace(NRC-RII)

W/A 411 Fayettevitte Street o P.O.Box 1551~Raleigh.N.C.27602

}1il f, PRELIMINARY AMBIENT NOISE SURVEY FOR SHNPP-1 CONTROL ROOM

Introduction:

The ambient noise survey addressed the listening environment, the sound level of annunciator horns and warning systems, and the operators comments on their ability to communicate in the control room.,The survey consisted of sound level readings taken at nine locations in the control room during a normal day shift.At each of the nine locations, sound level readings were taken on a wide band, dB(A)scale and for octave bands centered at the following frequenciess 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 KHz, 2 KHz, 4 KHz, 8 KHz, and 16 KHz.Readings for the fire alarm and paging system were taken for the wide band, dB(A)scale only.Results: The NUREG-0700 guideline for ambient noise recommends that background noise in the control room not exceed 65 dB(A), and not exceed 90 dB(A)for auditory singals.a~Two locations, one along the main control board and the other an operator's desk close to the main control board/showed sound level readings of 67 dB(A).These readings are not significantly out of line with regard to the guidelines and the remaining readings fall within the guideline.

J 1~~~Conclusion:

The background noise in the control room was recorded as 67 dB (A)which is only two dB above criteria.Since the operators have no problems with the background noise levels, it was determined no action is required.

I Kj

~~PRELIMINARY COMMUNICATIONS SURVEY FOR SHNPP-1 CONTROL ROOM

Introduction:

The preliminary communications survey addressed the operators ability to communicate throughout the control room and in the plant.The PA system, the Walkie-talkie system, the sound powered phone system and the conventional telephone system were evaluated.

The communication survey was conducted using the communications task plan and by interviewing five operators about the systems.Results: a~In general, the phones were seen as a source of problems.All of the operators mentioned that some of the lines into the control room would not ring unless their extension button was pushed in.Thus the operators have to depend on seeing the light lit up on the button in order to determine that the line is ringing.b.Two operators complained about the operating quality of the telephone pushbuttons.

They said that the buttons often didn t work making it difficult to switch lines.They also said that trying to put a line on hold often resulted in breaking the connection.

I~I~~1 c~,Two operators complained about the number of phones in the control room and their'locations.

One operator reported that, because a phone is not located on each desk it was difficult to hear the phones ring and to determine which phone was ringing.Another operator commented on the inconvenience of trying to use the extra phones.d.Two operators felt there were too many lines into the control room.e.One operator suggested adding a redial button to the receivers on the main control board.These receivers have buttons for dialing on the mouthpiece, but the operator has to depress the switchhook to establish a new connection.

This was said to be impractical at times when the operator was making adjustments or taking readings at the board.f.All five operators complained about the volume of the P.A.system, saying that it both annoyed them and sometimes interfered with verbal communications.

Sound level readings for the paging system were taken on announcements by one male and two females at different locations.

The sound level reading for the male announcer was 75 dB(A)and for the female announcers was 78 dB (A)and 82 dB(A).

\I g.Sound level readings for the fire alarm were taken from two different locations.

One location was right in front of the alarm.The second location was next, to the operators desk.The sound level readings for the location in front of the alarm was 92 dB(A), which exceeds criteria by two dB(A).The sound level readings for the location next to the operators desk was 78 dB(A).The intensity of the singal is unmistakable and gets the operators attention, therefore it was determined no action is required.Conclusions:

The conventional phone system problems listed were resolved when the telephones in the control room were replaced.Five new telephones were recen'tly put in the control room, with one on each desk.A woik request will be submitted to adjust the volume of the PA.

~~PRELIMINARY ILLUMINATION SURVEY FOR SHNPP-1 CONTROL ROOM

Introduction:

The illumination survey addressed the illumination levels throughout the control room.Illumination levels were taken at various key locations at the control panels and operator work stations under normal and emergency lighting conditions.

Results: The NUREG-0700 guidelines for illuminance vary depending on the work area.Most areas, including the primary and auxiliary operating panels, specify a range of from 20-50 footcandles (ftC)<with a recommended level of 30 ftC.The guidelines reduce the minimum for emergency lighting to 10 ftC.I a.Values for normal lighting on the benchboard range from 61-103 ftC with the'hot spot'ocated on the C panel benchboard.

b.Values for the main control board vertical panels range from 35-54 ftC.The'hot spots're on A and B panels adjacent to the C panel.

c~Under'emergency lighting the benchboard range becomes 30-65 ftC.with the hot spot located on the C panel.The vertical panel range becomes 21-35 ftC.This falls well within the guidelines.

d.The Control Room back panels range from 20-33 ftC under normal lighting.This drops to 9-21 ftC under emergency lighting.e.Computer workstations have a screen illuminance range of 25-50 ftC under normal lighting.The range drops to 14-37 ftC under emergency lighting.For the keyboards, the illuminance level ranges from 45-65 ftC for normal lighting, and 25-43 ftC for emergency lighting.f.'he NUREG-0700 guidelines for seated workstations where reading and writing will be done specify 50-100 ftC with a recommended level of 75 ftC.The recommended minimum drops IL to 10 ftC under emergency lighting conditions.

Under normal lighting conditions the desks have a range of illuminance of 57-85 ftC.This drops to 40-55 ftC under emergency lighting.The values for emergency lighting are well within standards.

~y~go Operators reported that they had no problems with glare affecting the reading of indicators/labels.

Some glare was observed on the Main Control Board CRTs.Conclusions:

The only" light level below the 10 f tC criteria for emergency lighting was the reading of 9 ftC.This value was recorded at the Cooling Tower Makeup Control Panel.Operators did not have a problem reading labels or indicators with this light level, therefore it was determined no action is required.The light levels that exceed criteria will be addressed within the Final Control Room Lighting Survey.This survey will address the impact the Control Room carpeting and new Control Room furniture has on the illuminance levels.Operators will also be interviewed to determine if they have any problems with the light levels and reading the CRTs due to glare on the CRTs.The results of the Final Control Room Lighting Survey will be assessed to determine appropriate resolutions for any discrepancies.

t

~ar~~~t PRELIMINARY HEATING'ENTILATION AND AIR CONDITIONING SURVEY FOR SHNNP-1 CONTROL ROOM

Introduction:

The preliminary HVAC survey addressed operator comments concerning the temperature and humidity levels in the control room.Hot/Cold spots, drafts, system reliability were assessed.Additionally the preoperational test of the control room HBAC has been completed and demonstrates that the system meets design temperature and humidity levels.Results: Operators were interviewed to determine if there were any problems with the HVAC in the control room.No problems were reported and no drafts or Hot/Cold spots were observed.Conclusions:

The preliminary survey was conducted right after the temporary air conditioning unit was removed from the control room.The permanent HVAC will be reassessed in the final survey to determine if the operators have problems with the system after they have had experience with the system on a continual basis.