Text

Request for Additional Information Regarding Extended Power Uprate
	ML110730025
Person / Time
Site:	Grand Gulf
Issue date:	03/09/2011
From:	Krupa M; Entergy Operations
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	GNRO-2011/00016
	Download: ML110730025 (77)
	v • d • e

S'Entergy Entergy Operations, Inc.

P. O. Box 756 Port Gibson, MS 39150 Michael A. Krupa Director, Extended Power Uprate Grand Gulf Nuclear Station Tel. (601) 437-6684 GNRO-2011/00016 March 9, 2011 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

Request for Additional Information Regarding Extended Power Uprate Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29

REFERENCES:

1. Email from A. Wang to F. Burford dated February 23, 2011, GG EPU Health Physics and Human Performance Branch Request for Additional Information (ME4639) (Accession Number ML110540705)

2. License Amendment Request, Extended Power Uprate, dated September 8, 2010 (GNRO-2010/00056, Accession Number ML102660403)

Dear Sir or Madam:

The Nuclear Regulatory Commission (NRC) requested additional information (Reference 1) regarding certain aspects of the Grand Gulf Nuclear Station, Unit 1 (GGNS) Extended Power Uprate (EPU) License Amendment Request (LAR) (Reference 2). Attachment 1 provides responses to the additional information requested by the Health Physics and Human Performance Branch.

No change is needed to the no significant hazards consideration included in the initial LAR (Reference 2) as a result of the additional information provided. There are no new commitments included in this letter.

If you have any questions or require additional information, please contact Jerry Burford at 601-368-5755.

A4of

GNRO-2011/00016 Page 2 of 2 I declare under penalty of perjury that the foregoing is true and correct. Executed on March 9, 2011.

Sincerely, MAK/FGB/dm Attachments:

1. Response to Request for Additional Information, Health Physics and Human Performance Branch

Enclosures:

1. Human Factors Design Criteria, ES-17 cc: Mr. Elmo E. Collins, Jr.

Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 612 East Lamar Blvd., Suite 400 Arlington, TX 76011-4005 U. S. Nuclear Regulatory Commission ATTN: Mr. A. B. Wang, NRRJDORL (w/2)

ATTN: ADDRESSEE ONLY ATTN: Courier Delivery Only Mail Stop OWFN/8 B1 11555 Rockville Pike Rockville, MD 20852-2378 State Health Officer Mississippi Department of Health P. 0. Box 1700 Jackson, MS 39215-1700 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150

Attachment 1 GNRO-2011/00016 Grand Gulf Nuclear Station Extended Power Uprate Response to Request for Additional Information Health Physics and Human Performance Branch to GNRO-2011/00016 Page 1 of 6 Response to Request for Additional Information Health Physics and Human Performance Branch By letter dated September 8, 2010, Entergy Operations, Inc. (Entergy) submitted a license amendment request (LAR) for an Extended Power Uprate (EPU) for Grand Gulf Nuclear Station, Unit 1 (GGNS). The U.S. Nuclear Regulatory Commission (NRC) staff has determined by correspondence dated February 23, 2011 (Accession Number ML110540705) that the following additional information related to Health Physics and Human Performance is needed for the NRC staff to complete their review of the amendment. Entergy's response to each item is also provided below.

In addition to the request for additional information (RAI) responses provided below, changes to several Abnormal Operating procedures that were not previously identified in Section 2.11.1 of B, "Safety Analysis Report for Grand Gulf Nuclear Station Constant Pressure Power Uprate," of the GGNS EPU LAR have been recognized. The following provides an update to a portion of Section 2.11.1, with revision bars marking the changes.

The planned changes to abnormal operating procedures (AOPs), called ONEPs at GGNS, are outlined below.

a The ONEPs listed below will be revised to rescale action points associated with reactor power; however, the event mitigation philosophy will not be changed. Affected procedures include:

o 05-1-02-1-2, Turbine and Generator Trips; o 05-1-02-111-3, Reduction in Recirculation System Flowrate o 05-1-02-111-5, Automatic Isolations; o 05-1-02-V-5, Loss of FeedwaterHeating; o 05-1-02-V-7, FeedwaterSystem Malfunctions; o 05 02-V-8, Loss of Condenser Vacuum; and o 05-1-02-V-11, Loss of Plant Service Water.

05-1-02-1-2, Turbine and GeneratorTrips - Revise generator hydrogen pressure regulator setting to reflect new EPU value.

05-1-02-1-4, Loss of AC Power- Change seal oil system nomenclature due to installation of a new seal oil system. Revise generator MVAR limits to reflect EPU values.

to GNRO-2011/00016 Page 2 of 6

05-1-02-11-1, Shutdown from the Remote Shutdown Panel - Change operator response time to reflect EPU values

05-1-02-111-1, Inadequate Decay Heat Removal- Revise the decay heat curves, heat up rates and temperature related data sheets to reflect the new EPU values.

05-1-02-V-1, Loss of Component Cooling Water- Add subsequent operator actions to account for installation of CCW heat exchanger tube cleaning system.

05-1-02-V-2, Loss of TBCW- Incorporate changes required as a result of the installation of a new seal oil system.

05-1-02-V-5, Loss of FeedwaterHeating - Revise the FW temperature vs. core power curve, which determines the actions to be taken in response to the event, to reflect the new EPU values.

05-1-02-V-7, Feedwater System Malfunctions - Change the RFPT critical speed parameter following replacement of RFPT. Update to reflect EPU condensate transient analysis.

" 05-1-02-V-11, Loss of Plant Service Water- Add subsequent operator actions to account for installation of CCW heat exchanger tube cleaning system.

05-1-02-V-1 2, Condensate/ Reactor Water High Conductivity - Revise to reflect impact of CFFF and LEFM modifications.

RAI # 1 GGNS Current Licensing Basis The licensee stated in its September 8, 2010 submittal that the general design criteria (GDC) in Appendix A of 10 CFR 50 effective May 21, 1971, and subsequently amended July 7, 1971, are applicable to GGNS. GGNS conformance with the GDCs may be found in Updated Final Safety Analysis Report (UFSAR) Sections 3.1 and 7.1.2.5. The human factors program is not described in any GGNS licensing basis document; however, it is governed in accordance with Engineering Standard ES-17, "Human Factors Design Criteria."

Submit Engineering Standard ES-17, "Human Factors Design Criteria." for NRC staff review.

Response

The current version of Engineering Standard ES-17, "Human Factors Design Criteria" is included in Enclosure 1.

to GNRO-2011/00016 Page 3 of 6 RAI #2 Changes to Operator Actions Sensitive to the EPU The responses to this topic of Regulatory Issue Summary (RIS)-001, "Review Standard for Extended Power Uprates" were not complete:

a. Identify any operator workarounds that will exist after implementation of the EPU and demonstrate that they will not delay any time-critical actions (safety-significant actions required to be done in <30 minutes).

b. Identify any operator actions that are being automated.

c. Identify and justify any automated actions that will become manual after implementation of the EPU.

d. Attachment 13, Table 14.1-1 contains many "key operator actions" with allowable times of less than 30 minutes. Which of these actions will be validated with empirical data to confirm that GGNS operators are able to reliably perform these actions within the EPU allowable times in this table?

e. In Attachment 5B, Table2.5-1, "Appendix R Fire Event Evaluation Results," allowable time for Maximum Operator Action Time to Open ADS valves (minute) was reduced from 18 minutes to 14.3 minutes. Have the operator response times been validated to be less than 14.3 minutes?

Response

a. GGNS Operation's Section Guideline OPG-12, OperatorWorkarounds, defines an operator workaround as: "Any plant condition (equipment or other) that would require compensatory operator actions in the execution of normal operating procedures, abnormal operating procedures, emergency operating procedures or annunciator response procedures during off-normal conditions."

GGNS is currently tracking two (2) operator workarounds:

1) Radial well pumps cannot be controlled from a remote location and have to be started locally; and

2) The Division 1 Load Shed Sequencer (LSS) switch requires declaring the Division 1 Diesel Generator INOPERABLE when it is paralleled to the grid.

Neither workaround currently impacts time-critical operator actions. The radial well pumps telemetry operator workaround is scheduled to be resolved prior to RF18. The LSS switch operator workaround is scheduled to be resolved during RF18. If these workarounds are not resolved prior to the startup from RF18, they will continue to have no impact on time-critical operator actions following the implementation of EPU. In addition, EPU implementation does not introduce any new operator workarounds.

b. None of the existing manual operator actions evaluated in the current licensing basis for GGNS are being automated. Further, as stated in Attachment 5B, Section 2.11.1.2 of the to GNRO-2011/00016 Page 4 of 6 EPU LAR: "There are no new credited operator actions required as a result of EPU." In addition, no automated actions evaluated in the current licensing basis for GGNS become manual actions after implementation of EPU.

c. See the response to b.

d. Attachment 13, Table 4.1-11, Re-Assessment of Key OperatorAction HEPs for the EPU, summarizes an assessment of the operator actions explicitly reviewed based on the criteria provided in Attachment 13. The increased power level reduces the time available for some operator actions by small increments. The reduction in the available time is generally small compared with the total time available to detect, diagnose, and perform the actions. The operator actions with allowable times less than 30 minutes reflected in Table 4.1-11 are Control Room actions consisting of a limited number of steps (e.g., initiation of an emergency system,, repositioning of one or two valves, etc.). Because of the location and simplicity of these actions, they can easily be performed within the allowable times from a physical standpoint; however the actions are not specifically timed. Simulator training of specific accident scenarios is routinely provided and ensures the Control Room Operators can quickly detect and diagnose the need to perform these actions.

e. Operator response times were validated to be less than 14.3 minutes during the NRC Triennial Fire Protection Inspection conducted on April 11, 2005 through May 12, 2005 (reference - NRC Triennial Fire Protection Inspection Report 05000416/2005-08 dated June 21, 2005). During this inspection, NRC team members observed operators simulate performing the steps of Procedure 05-1-02-11-1, Shutdown from the Remote Shutdown Panel, Revision 30. The team verified that the minimum number of available operators, exclusive of those required for the fire brigade, could reasonably be expected to perform the procedural actions within the applicable plant shutdown time requirements. The shutdown time requirement contained in Revision 30 of Procedure 05-1-02-1-1 was 13 minutes.

RAI # 3 Changes to Control Room Controls, Displays and Alarms

a. Will the EPU require any operator interface changes from analog to digital? If so, list those digital changes that change, add, or delete displays used by operators, discuss any differences between the analog display and the digital display, and justify the equivalency or describe the advantages of digital display for the operator(s).

b. How will the operators be tested to determine that they can use the displays and controls reliably?

Response

a. Along with EPU, GGNS is implementing the digital Power Range Neutron Monitoring System (PRNMS) during the upcoming spring refueling outage. The PRNMS equipment is designed to replace existing Average Power Range Monitor (APRM) components in their current locations within control room panels 1H13-P669, 1H13-P670, 1H13-P671, 1H13-P672, and 1H13-P680.

Of the changes to be implemented, PRNMS introduces new graphic displays to panels P669 through P672. Four (4) displays will be installed, one in each panel, to replace the existing to GNRO-2011/00016 Page 5 of 6 Local Power Range Monitor (LPRM) analog meters. The displays are self-contained with four menu soft-keys below the screen. Each display is divided into three sections (upper, middle, and lower), which are accessed via the soft-keys. The upper section is reserved for critical information and channel status, including "INOP," "Bypass," "Trouble," and "Alarm" indications. This presentation ensures the operator is continuously provided with the status of each channel. The other two sections display additional system information such as APRM and LPRM data and Oscillation Power Range Monitor (OPRM) status information.

The displays simplify data presentation to the operators compared with existing data presentation features and are consistent with guidance in NUREG-0700 Sections 1.2, "Display Formats," 1.3, "Display Elements," and 1.4, "Data Quality and Update Rate."

The displays are designed such that optical reflections, ambient noise, and control room environmental factors will not interfere with the ability of the operators to perceive and comprehend the data. This design complies with the guidance of NUREG-0700 Sections 1.5, "Display Pages," and 1.6, "Display Devices."

Adequate levels of illumination are part of the new displays and ensure that visual effectiveness is sufficient for task performance. Monitor light levels are verified as adequate to ensure visual effectiveness. Glare is almost non-existent and displays are not shadowed.

Surface colors are recognizable under both normal and emergency lighting conditions.

These characteristics are consistent with NUREG-0700 Section 7.2, "Information Display."

Additional information regarding the PRNMS and its associated Human Factors Evaluation is provided in Entergy letter GNRO-2010/00075 to the NRC dated December 13, 2010 (ADAMS Accession No. ML103480114).

b. Grand Gulf simulator software and hardware changes related to EPU will be installed prior to the EPU implementation outage. This will allow operator training to begin in the plant reference simulator prior to the outage. Training is expected to continue through startup from the EPU implementation outage.

RAI #4 B Section 3 Pages 266/540 Please describe how the decreased time margin for the Main Condenser (MC) storage capacity (from 92 seconds at current licensed thermal power to 79 seconds at EPU thermal power) will impact the N-16 and radioiodine radiation levels within the MC.

Response

The decreased time margin for the Main Condenser storage capacity (from 92 seconds at Current Licensed Thermal Power to 79 seconds at Extended Power Uprate, i.e., 13 seconds) has insignificant impact on the iodine radioactivity levels within the Main Condenser since the shortest half-life associated with radioiodines is 52.6 minutes (applicable to 1-134).

The radiation levels near the Main Condenser from N-16 are dominated by the steam vapor phase. The majority of the N-1 6 inventory in reactor steam which reaches the Main Condenser will primarily partition to the main condenser vapor space from where it is removed (together with the exhaust steam and non-condensibles), by the Steam Jet Air Ejectors. The vapor space N-16 inventory will not be affected by the decrease in Main Condenser liquid retention time.

to GNRO-2011/00016 Page 6 of 6 A small fraction of the main condenser inventory of N-16 partitions to the condensate and will be collected in the hotwell. The N-16 activity in the condensate will increase due to the reduction in the Main Condenser retention time and associated decrease in hold-up and decay time.

However, with an N-16 half-life of 7.13 seconds, even a 79 second delay results in a reduction of the N-16 activity in the condensate by a factor of 2165, which makes the contribution of the N-1 6 in the condensate to the radiation levels near the Main Condenser insignificant compared to contribution of the N-16 in the vapor space.

Thus, and as noted in LAR Attachment 5 Section 2.5.4.2, the radiation levels near the Main Condenser are not expected to be significantly impacted by the decreased time margin for the Main Condenser storage capacity.

Note that dose rates due to N-16 in the condenser area are expected to increase by up to 27%,

as noted in LAR Attachment 5, Section 2.10.1.2.1, but as explained above, this is not due to the reduction in condensate retention time in the condenser.

Enclosure 1 GNRO-2011/00016 Grand Gulf Nuclear Station Extended Power Uprate Human Factors Design Criteria, ES-17 (Best Copy)

STANDARD NO.: ES-17 REVISION- 2 DATE: November 3, 1989 SYSTEM ENERGY RESOURCES, INC.

GRAND GULF NUCLEAR STATION HUMAN FACTORS DESIGN CRITERIA ES-17 NON-SAFETY RELATED SAFETY EVALUATION APPLICABILTTY REVIEW Yes No (1) Change to Facility as Demt. in FSAR (2) Change to Procedure as Deec. in FSAR (3) Proposed Test or Experiment not Deac.

in FSAR (4) Change to Tech. Spec.

(If Yes, perform 10CFR50.59 Safety Evaluation)

Safety Evaluation No. N/.

SIGNATURE: DATE:

DEI" all*1FAC),

W_ - I __

GRAND GULF NUCLEAR STATION NUCLEAR PLANT ERGINKER ING REVIEW AND APPROVAL SHEET STANDARD NO.: ES-17 REVISION: 02 STANDARD TITLE: HUMAN FACTORS DESIGN CRITERIA This document specifies items related to nuclear safety Yes /n NO /-7 Signatures certify that the above standard was originated, verified, reviewed or waived and ap roved sntdblw ORIGINATED BY:, DA Jý"TE VERIFIED BY:-d" DATE 2 BY:_____ ___IE DATE h~

mmmmmm.*m*mm NPE SECTION REVIEWED BY REVIEW WAIVED BY DATE ELECTRICALII Y,-/ /7 I Ai I l a.

I CIVIL /Qoo/8_1 MECHANICAL l ANtI N/A DATE:

(Insert N/A if not applicable)

APPROVED : I DATE:-1 3 Manager, Nuclear Design Form 321.1, Rev. 3

STANDARD NO.: ES-17 PAGE: 3 Revision 2 REVISION STATUS SHEET Standard Revision Summary REVISION ISSUE DATE DESCRIPTION 0 01/12/87 Issued for use 1 Rev. per NRC Comments 2 11/03/89 Rev. to increase usability PAGE REVISION STATUS PAGE PAGE PAGE PAGE NO. REVISION NO. REVISION NO. REVISION NO. REVISION 1 2 16 2 31 2 46 2 2 2 17 2 32 2 47 2 3 2 18 2 33 2 48 2 4 2 19 2 34 2 49 2 5 2 20 2 35 2 50 2 6 2 21 2 36 2 51 2 7 2 22 2 37 2 52 2 8 2 23 2 38 2 53 2 9 2 24 2 39 2 54 2 10 2 25 2 40 2 11 2 26 2 41 2 12 2 27 2 42 2 13 2 28 2 43 2 14 2 29 2 44 2 15 2 30 2 45 2 APPENDIX/ATTACHMENT REVISION STATUS APPENDIX NO. REVISION ATTACHMENT NO. REVISION A 2 N/A N/A NELSTD ES-17 R-0 STATUS SHEET

STANDARD NO.: ES-17 PAGE: 4 REVISION: 2 TABLE OF CONTENTS SECTION TITLE PAGE 1.0 Scope 6 2.0 General Information 7 3.0 Applicable Documents 8 4.0 Labels and Location Aids 8 4.1 Lettering 8 4.2 Label Specifications 12 4.3 Label Content 13 4.4 Label Location 14 4.5 Label Mounting 15 4.6 Label Sequence 15 4.7 Hierarchial Labeling 15 4.8 Post Accident Monitoring (R.G. 1.97) Labeling 17 4.9 Color Coding 17 4.10 Use of Mimics 18 4.11 Temporary Labeling 20 5.0 Panel Layout 21 5.1 Control/Display Grouping 21 5.2 Control Layout Enhancement 21 6.0 Control - Display Integration 23 6.1 Location 23 6.2 Control/Display Response 24 6.3 Control/Display Enhancement 24 6.4 Typical Switch/Indicator Configuration 24 7.0 Controls 7.1 General 26 7.2 Color Coding 26 7.3 Shape Coding 27 7.4 Direction of Movement 28 7.5 Control Enhancement 29 7.6 Pushbuttons 30 7.7 Keyswitches 30 7.8 Rotary Controls 31 7.9 Thumbwheels 32 7.10 Slide Switches 32 7.11 Toggle Switches 32 7.12 Rocker Switches 32 NELSTD ES-17 R-0 TOC

STANDARD NO.: ES-17 PAGE: 5 REVISION: 2 8.0 Visual Display 33 8.1 General 33 8.2 Color Coding 33 8.3 Direction of Movement 33 8.4 Display Visability 34 8.5 Display Scales 34 8.6 Display Pointers 37 8.7 Light Indicators 38 8.8 Recorders 40 8.9 Counters 41 9.0 Annunciators/Visual Alarms 42 9.1 Lettering 42 9.2 Alarms 43 9.3 Auditory Signals 44 9.4 Visual Alarms 45 9.5 Annunciator Response Controls 48 10.0 Environment 50 10.1 Climate 50 10.2 Lighting 51 10.3 Auditory Environment 54 10.4 Decor 54 11.0 Appendices Appendix A, Standard Abbreviations and Acronyms NELSTD ES-17 R-0 TOC

Standard No.: ES-17 Revision: 2 Page: 6 1.0 SCOPE This standard contains human factors design criteria to be used for preparation and review of design changes to the GONS main control room, upper cable spreading room, remote shutdown panel areas and the alternate shutdown control and transfer panels.

NOTE: In this standard these areas are collectively referred to as the "Control Room".

This standard may also be used for the preparation and review of design changes to other areas.

1.1 PURPOSE Human factors engineering addresses the efficient and safe operation of the Control Room from the operator's perspective.

When making design changes in the Control Room, it is important to consider how the changes will affect the operator in terms of the availability of necessary information, the adequacy of controls for the tasks performed, the efficiency of the overall panel layout, and the suitability of the environment.

1.1.1 Section 4.0 outlines criteria related to labels and location aids. A hierarchical labeling scheme, including labels for systems, iubsystems, and individual panel elements, directs the operator quickly to the component he needs. Labels should be mounted securely and should not obscure other information. Mimics can be used to integrate a group of controls into a system, making functional relationships clear to the operator.

1.1.2 Section 5.0 outlines criteria related to panel layout.

Controls and displays should be grouped in a way that reflects functional organization and minimizes operator movemaet. For instance, components that belong to the same system should be located on the same panel, in an arrangement that indicates their relationship to each other. A series of controls that are used in sequence should be positioned in sequence on a control panel. Positioning controls where the operator can find them easily reduces the time required to perform a task and the chance of operator error.

1.1.3 Section 6.0 discusses control-display integration, the association of controls and displays that are used together.

Important considerations include: (1) ensuring that the operator can read a display while operating related controls and (2) labeling controls and displays used in the same sequence of actions while the same alphabetic or numeric sequence. Both Sections 4.0 and 5.0 contain many guidelines that apply to all Control Room design changes, regardless of the type of component affected.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 7 1.1.4 Section 7.0 contains criteria specific to controls. The operator should be able to perform a required function easily with the controls available. Accidental activation of a control should be prevented. The function of a control should be clearly identified, by color or shape coding, location, and labeling. Careful selection and Identification of controls are essential to efficient Control Room operation.

1.1.5 Section 8.0 Includes guidelines on visual displays.

Displays should also be clearly identified and easy to locate. Scales should cover the full range of possible values and provide the degree of precision needed. Light indicators should be clearly "on" or "off". The overall intent Is to provide the operator with all the information .be needs, without extraneous information that may distract or confuse.

1.1.6 Section 9.0 provides guidelines on annunciator systems.

Annunciator warning systems, both visual and audible, should be discriminable and recognizable to operators. Window legends should be legible and succinct; annunciator response controls should be consistent in operation and placement to facilitate operator's response to alarms and subsequent remedial activities.

1.1.7 Section 10.0 contains criteria specific to the control room environment. Such factors as lighting, sound, temperature, and ventilation are important considerations. An effort should be made to create a pleasant and comfortable work setting for the Control Room personnel.

1.1.8 Appendix A is a list of standard abbreviations and acronyms to be used for labeling and equipment identification.

2.0 GENERAL INFRMATION 2.1 DEFInTIONS 2.1.1 Hierarchical Labeling - A labeling scheme usually employed in conjunction with demarcation to identify groups of functionally related controls and displays. Typically five "levels" of labels are employed: 1) panel; 2) major system; 3)subsystems or functional groups; 4) individual components;

.and 5) control position identifiers. See section 6.6.1.2 of NUREG-0700 for an example.

2.1.2 Mimics - A schematic diagram showing physical or functional interconnections among the components of a system. Typically controls and/or displays are imbedded in the diagram in the location of the component they control.

NELSTD ES-17, R-2 TEXT

Standard No.; ES-17 Revision: 2 Page: 8 2.1.3 Shape CodLng - The practice of using distinctively shaped objects or symbols to facilitate visual identification.

Commonly used for control handles, where the distinctive shape aids visual identification and allows correct identification (or confirmation of identification) by the feel of the handle.

2.1.4 Demarcation - The use of lines or color background shading on the control panel to set off groups of functionally related controls and/or displays.

2.1.5 Succinct Labeling - Labeling using compact precise expressions without wasted words.

3.0 APPLICABLE DOCUMENTS 3.1 NUREG-0700, "Guidelines for Control Room Design Reviews".

3.2 NUREG-0737 Supplement I (Generic Letter 82-33), "Requirements for Emergency Response Capability".

3.3 NPEAP 01-304, "Design Change Packages".

3.4 DCRDR Human Factors Criteria, March 1985.

3.5 AECM 86/0226, "GGNS - 1 DCRDR Finally Summary Report", dated 7/31/86.

4.0 LABELS AND LOCATION AIDS Label clearly and appropriately all controls, displays, and other equipment items that must be located, identified, and/or manipulated.

4.1 LETTERING Lettering for plant lables covered under the scope of ES-17 should meet the criteria defined below for the specific types of labels.

This criteria includes label height, width, letter stroke width, character height, label border and type style.

Labels should be fabricated to meet the specifications defined for the particular type of label in the system heirarchy. The label specifications listed below should be followed as closely as possible.

4.1.1 Panel Label Specifications: (See Figure 4.1-1)

1. Label Length: Varied (depends on Panel)

2. Minimum Side Borders: I in. + 1/16 in.

3. Label Height: 2 1/2 in. + I/T6 in.

4. Minimum Top an Bottom Borders: 1/2" + 1/8 in.

5. Character Height: 1 1/2 in. + 1/16 in.

6. Character Width: 7/8 in. + 1716"

7. Stroke Width: 1/8 in. + 1732 in

8. Minimum Distance between Characters: 9/16 in. + 1/16 in.

9. Minimum Distance between Words: 1/4 in. + 1/8"-

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I Page: 9 FIGURE 4.1-1 PANEL LABEL 7/8-

-. 9- p I

-- 1/2" 21 P870 T

2 1/214 1 1/2-L 1/8" 4.1.2 System Label Specifications: (See Figure 4.1-2)

I. Label Length: Varied (depends on System)

2. Minimum Side Borders: 5/8 in. + 1/16 in.

3. Label Height: 3/4 in. + 1/16 Tn.

4. Minimum Top and Bottom Borders: 1/8" + 1/16 in.

5. Character Height: 1/2 in. + 1/16 in.

6. Character Width: 3/8 in. +71/16"

7. Stroke Width: 1/16 in. + T/32 in

8. Minimum Distance between Characters: 3/16 in. + 1/16 in.

9. Minimum Distance between Words: 9/16 in. + I/I1" FIGURE 4.1-2 SYSTEM LABEL 3/,:6" 3/a" emý H5/H 1/8-TBCW -L 1/r" NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 10 4.1.3 Subordinate Label Specifications: (See Figure 4.1-3)

1. Label Length: Varied (depends on Sub-System)

2. Minimum Side Borders: 1/8 in. + 1/16 in.

3. Label Height: 1/2 in. + 1/16 in.

4. Minimum Top and Bottom Borders: 1/8" + 1/16 In.

5. Character Height: 1/4 in. + 1116 in.

6. Character Width: 1/4 in. 4--1/16"

7. Stroke Width: 1/16 in. + T/32 in

8. Minimum Distance between- Characters: 1/16 in. + 1/16 in.

9. Minimum Distance between Words: 1/4 in. + 1/16W FIGURE 4.1-3 SUBORDINATE LABEL 1~/8". 1/8'*

I/ao 1/4" 1/4" I -

l*1 I I I+1 E I T

1/2" 4 TBCW PMPS 1/8" 4.1.4 Component Label Specifications: (See Figure 4.1-4)

a. Component Tdentification Lettering

1. Label Length: Varied (depends on Panel) 2..Minimm Side Borders: 1/8 in. + 1/16 in.

3. Label Height: See Applicable Arrangement Drawing

4. Minimum Top and Bottom Borders: 1/8" + 1/16 in.

5. Character Height: 1/8 in. + 1/32 in.

6. Character Width: 3/32 in. T 1/641

7. Stroke Width: 1/32 in. + 1764 in

8. Distance between Characters: 1/32 in. + 1/64 in.

9. Minimum Distance between Words: 3/32 i1. + 1/64"

10. Minimum Distance between Lines: 1/16 in. + 1/32"

b. Control Position Lettering on Component Labels

1. Character Height: 3/32 in. + 1/64 in.

2. Character Width: 1/16 in. +-1/32"

3. Stroke Width: 1/32 in. + 1764 in

4. Minimum Distance between Characters: 1/32 in. + 1/64 in.

5. Minimum Distance between Words: 1/16 in. + 1/32

6. Minimum Distance between Lines: 1/16 in. T 1/32" NELSTD ES-17, R-2 TEXT

Standard No.: 'ES-17 RevisLon: 2 I Page: 11, FIMRZ X.1-4 cOmRET LABEL 1/ 16".-1 1/8 1/1 4.1.5 Control Position Labels: (See Figure 4.1-5 for Typical Examples)

1. Label Length: 1 5/8 In. + 1/32 in.

2. Side Borders: 1/16 in. +/--1/32 in.

3. Label Height: 15/32 In.-

4. Top and Bottom Borders:

L) Top Border With 1 Line of Text: 5/32 In. + 1/64 In.

Ii) Bottom Border With 1 Line of Te@t: 3/16 in. + 1/64 in.

i£i) Top Border With 2 Lines of Text: 1/16 in.

iv) Bottom Border With 2 Lines of Text: 3/32 it.

5. Character Height: 1/8 in. + 1/64 in.

6. Character Width: 1/16 in. +41/32In.

7. Stroke.Width: 1/32 in. + 1764 in

8. Distance between Charac&tex: 1/32 In. + 1/64 in.

9. Distance between Words: 1/16 In. + 1/37

10. Distance between Lines: 1/16 in. T 1/32" NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I Pase: 12 FIGURE 4.1-5 CONTROL POSITION LABEL 4.2 LABEL SPECIFICATIONS 4.2.1 Specifications for Component Identification

a. Format for Equipment Identification Numbers shall be b.

in accordance with General Engineering Staqdard GES-O1 (Total Plant Numbering).

Abbreviations and acronyms used shall be in accordance I

with Appendix A.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 13 4.2.2 Specifications for Instrument and Panel Labeling

a. Instrument and panel labeling shall not interfere with the operator's ability to read the instrument or observe panel indication.

b. Instrument and panel labels should include the following:

1. Instrument number (e.g., E31-PI-R604).

2. Instrument Description (e.g., Turbine Lube Oil Temperature).

3. Units of measurement, if not on instrument (e.g.,

F or C, psig, gpm).

c. Abbreviations and acronyms used shall be in accordance with Appendix A.

4.2.3 Component identification labels shall be manufactured in accordance with the specifications of Section 4.2.

4.3 LABEL CONTENT 4.3.1 Labels should provide the following kinds of information:

a. The equipment identification number (where applicable).

b. A brief function description.

c. Engineering characteristics or nomenclature, if needed for clarity.

d. Colored dots on the lower right hand of the label can be used to show equipment division.

4.3.2 Wording on labels should be selected as follows:

a. Use words that express exactly what action is intended.

b. Make instructions clear and direct.

c. Use words that have a commonly accepted meaning for all intended users.

d. Avoid unusual technical terms.

e. Abbreviate words whenever possible (See Appendix A) or spell words correctly.

4.3.3 Use consistent nomenclature in labels:

a. Use the standard part/system numbers listed in General Engineering Standard GES-O1 (Total Plant Numbering).

b. Use the standard abbreviations and acronyms listed in Appendix A.

c. Use words, acronyms, abbreviations, and part/system numbers consistently within and across a piece of equipment.

d. Nomenclature in labels should be consistent with nomenclature in plant procedures (i.e. System Operating Instructions, Alarm Response Instructions, etc...)

e. Nomenclature in labels must match the label drawing, but does not necessarily have to directly correlate to the description used by the design engineer in other plant design drawings.

NELSTh ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 14 4.3.4 Observe the following guidelines when using symbols:

a. Use abstract symbols only if they have a commonly accepted meaning for all intended users (e.g., %).

b. Symbols should be unique and distinguishable from each other.

c. Use a commonly accepted standard configuration.

d. Use symbols consistently within and across panels.

e. Avoid using Roman numerals.

4.3.5 Wording on labels should be concise without compromising meaning.

4.3.6 When labels containing similar words, abbreviations, or acronyms are located close to each other, reduce the possibility of confusing controls by:

a. Selecting different words, or

b. Coding the controls with Equipment Identification Numbers.

4.3.7 Label control positions as follows:

a. Identify all discrete functional control positions.

b. Identify direction of motion (increase, decrease) for continuous motion rotary controls.

c. Control position information should be easy to read, without parallax, during operation of the control.

4.3.8 Label each access opening used by Control Room operators to identify the function of items accessible through it.

4.3.9 All danger, warning, and safety instruction labels should be in accordance with appropriate OSHA safety standards.

4.4 LABEL LOCATION 4.4.1 Position labels as follows:

a. Place the label above the panel component(s) it describes.

b. For components above eye level, position labels below component to ensure label visibility.

c. Place the label close to the panel component it describes.

d. Avoid placing the label on the component itself if the operator's hand will obscure the label for an extended time period or if the component is wholly removed from the panel for maintenance, recalibration, etc&..

e. Separate adjacent labels so that they will not be read as one continuous label.

f. Place labels below all circular meters and position indicating lights.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 15 4.5 LABEL MOUNTING 4.5.1 Mount labels as follows:

a. Mount labels in a manner that will prevent accidental removal.

b. Mount labels on a flat surface.

c. Mount labels using a cyan acrulate adhesive such as Eastman 910, a silicon rubber adhesive such as GE RTV-106, a double-back urethane foam tape such a 3-M Scotch Brand or NPE approved equivalent adhesive material.

4.5.2 Orient labels to prevent confusion and delays in location and identification of components.

a. Orient labels horizontally so that they may be read quickly and easily from left to right.

b. Use vertical orientation only where space is limited.

c. Avoid curved patterns of labeling.

4.5.3 Ensure the visibility of labels and other information:

a. Labels should not detract from or obscure any other information source, such as figures or scales on displays.

b. Labels should not be covered or obscured by other units in the equipment assembly.

c. Labels should be visible to the operator during control actuation.

4.6 LABEL SEQUENCE 4.6.1 If controls and displays are used in sequence:

a. Label them in alphabetic or numerical sequence (e.g.

F023AB)

b. Label associated controls and displays used in a particular sequence.

4.7 HIERARCHICAL LABELING As mentioned in Section 2.1.1, hierarchical labeling is a labeling scheme often used with demarcation to identify groups of related controls and displays with the same function within the same system. Typically three "levels" of labels are employed: 1) major system; 2) subsystems or functional groups; and 3) individual components. See Figure 4.7-1 for an example.

4.7.1 Use a hierarchical labeling scheme to reduce confusion, operator search time, and redundancy (Reference Figure 4.7-1):

a. Use panel labels to identify major systems or panel bench boards.

NELSTD ES-17, R-2 TEXT

Standard No..: ES-L7 Revision: 2 Page: 16

b. Use systm labels to identify major systems.

a. Use subordfrte labels to identify subsystems of functional groups.

d. Use component labels to identify each discrete panel or panel component.

I

a. Use control position labels to identify component control positions.

f. Label& should not repeat information contained in higher level labels.

FIGURE 4.7-1 UMRCE.CAL L,. ELING SCEC..

PANEL LABEL-- P870 SYSTEM LABEL----,

1BCW-m SUBORDINATE LABEL --- [ I moCW PM&]I 00MPup is COMPONENT LABEL I VMESrD .S-17, RI-2 TEXT

Standard No.: ES-17 Revision: 2 I Page: 17 4.8 POST ACCIDENT MONITORING (R.G. 1.97) LABELING 4.8.1 Label "Regulatory Guide 1.971" Control Room equipment (i.e equipment that is to be used to follow the progress of transients and accidents), with a red label with white lettering, "Post Accident" above the component number.

(Reference Figure 4.8.1)

FIGURE 4.8.1 POST ACCIDENT MONITORING LABEL POST ACCIDENT 1B21-LR-R615A 4.9 COLOR CODING 4.9.1 Color coding can be used to allow the operator to locate equipment quickly as well as alert them of criticality of the component. Color coding may also be used to identify functional relationships among components and between controls and displays. Keep color codes simple by selecting colors that conform to the common usage in everyday life.

a. Plant labels should conform to the color coding criteria defined in Table 4.9-1.

b. Plant control panel mimics should conform to the color coding criteria defined in Table 4.9-2.

TABLE 4.9-1 LABEL COLOR CODING CONVENTIONS Color Meaning White with black characters Summary labels (Main Control Area)

.Black with white characters Summary labels (Back Panels)

Yellow with black characters Division 1 Blue with white characters Division 2 Green with white characters Division 3, HPCS Orange with white characters Division 4 White with black characters All other component labels (Main Control Area)

Black with White characters All other back panel component labels NELSTD ES-17, R-2 TEXT

Standard No..: ES-17 Revision: 2 I Pase: 18

..... COOTA LE 4.9-2..

MIMIC COLOR CODING CONVENTTONS Color Procena/Electrical

Red Stem

Blue ~rains//RWCU-Safety

v. LLe ' ter Related

Light Blue Se~rvi e .ter/S andby Service Generator/Transaformsr

+White Turbine Symbol Draft Symbol Pump Symbol IPV Symbols HX Symbol

Orange Ventilation Air

Yellow 480 V

Yellow 4.18 KV

Light Brown 6.9 KV

Orange 13.8 KV

Light Green 34.5 KV

Dark Brown 115 KV

Dark Green 500 KV

Use white arrows an required

+Use black arrows as required 4.10 USE OF MIMICS 4.10.1 Use mimics to serve the following functions:

a. To integrate systm components into functionally orLented diagrams that reflect component relationships.

b. To decrease the operator's decision-making load.

4.10.2 Observe the following guidelines wben using color in I

a. Color code flowpaths according to the conventions In Table 4.9.2.

b. Use colors that are distinguishable from each other.

c. Ensure adequate contrast betveen the mimic colors and the panel.

d. Ensure that no more than four mimic lines of the same color run in parallel if the operator must quickly identify any one of the lines.

e. Mimic lines should be no wider than 1/4" and no smaller than I/b" wide to ensure visibility.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 19 4.10.3 Mimic lines should c~nform to the following guidelines:

a. Use different line widths to code flowpachs (e.g.,

significance, volume, level).

b. Avoid overlapping mimic lines.

c. Clearly indicate flow directions with distinctive arrowheads.

d. Label all mimic origin points that do not begin at labeled components.

e. Label all mi4ic destination or terminal points that do not and at labeled components.

f. Identify component representations on mimic lines.

4.10.4 Symbols used with mimic lines should be: (See Figure 4.10-1 !

a. Readily understood and commonly used.

b. Used consistently.

FIGURE 4.10-1 COMMONLY USED MIMIC SYMBOLS iun NET ,

=Crlac TANK UAI= POT POO 00TU GEOMTOR NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 20 4.11 TEMPORARY LABELING 4.11.1 Use a temporary label when necessary to identify out-of-service equipment, to accommodate unique. one-tine plant activities, or to improve operator understanding and efficiency:

a. Use a temporary label only until a permanent label is available or until the temporary label Is no longer necessary.

b. Temporary labels should conform to good human engineering principles defined in this Engineering Standard.

c. A temporary label should not obscure a prior permanent label unless the old label is to be replaced.

d. Tag-outs should:

1. Clearly identify out-of-service components and equipment.

2. Be securely affixed.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 21 5.0 PANEL LAYOUT 5.1 CONTROL/DISPLAY GROUPING 5.1.1 Group controls and displays according to the following:

a. Task sequence.

b. System function.

c. Importance and frequency of use.

5.1.2 Separate controls in order to;

a. Allow access to adjacent controls.

b. Allow simultaneous actuation where necessary.

c. Prevent inadvertent actuation of adjacent controls.

5.1.3 Arrange strings or clusters of similar components as follows:

a. Group components in horizontal rows no more than 20 inches long.

b. Break up strings of more than five components into smaller strings by spacing or demarcation.

c. Label left and top coordinate axes of large matrices to identify components.

5.2 CONTROL LAYOUT ENHANCEMENT 5.2.1 Use the following methods to assist recognition and identification of controls.

a. Spacing between groups of components.

b. Demarcation of groups of controls and displays with a contrasting line consistent with the demarcation conventions defined in Table 5.2-1. See Figure 5.2.2 for an illustration of demarcation.

c. Color shading consistent with the color coding conventions defined in Tables 4.9.1 and 4.9.2.

TABLE 5.2-1 DEMARCATION CONVENTIONS Size:

Width 1/8"-3/81 Depth 1/16" Color:

Green* HPCS on 870 panel Light Gray All others

Green should be the same shade as labels for HPCS on 601 panel.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I

Page: 22 MIUE 5.2-.2 PAMEL DEMARCATION

-3/am I

II

NOTE: Une size will vary due to space limitations 5.2.2 Denote emergency controls with distinctive enhancement techniques. For esample.

a. Color coded handles.

b. Different shaped handles.

5.2.3 Arrange controls and displays:

a. In a logical order.

b. In sequence, such as left-to-right or top-to-bottom,

-if appropriate.

5.2.4 Standardize the layout of controls and displays:

a.

b.

When possible, use a consistent layout for identical or similar control or display sets at all locations.

Avoid mirror-Imaging.

I

c. Use consistent layouts for the simulator and the actual Control Rloom.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 23 6.0 CONTROL - DISPLAY INTECRATION 6.1 LOCATION 6.1.1 Position associated controls and displays as follows:

a. Position the control below or to the right of its associated display so that the display is not obscured during control manipulation.

b. Position the display close enough to the control to be read clearly and without parallax during operation.

6.1.2 Establish the association of controls and displays by:

a. Location.

b. Labeling.

c. Demarcation.

d. Consistency with operator expectations.

6.1.3 The following should be immediately apparent to the operator:

a. The association of displays with controls.

b. The direction of movement of displays and controls.

c. The rate and limits of movement of displays and controls.

6.1.4 Use a symmetrical layout for associated controls and displays that are used in the same sequence.

6.1.5 If a single display is associated with multiple controls:

a. Center the controls on the display.

b. Group the controls in a line or matrix.

c. Mount controls directly below or to the right of the display.

6.1.6 If a single control is associated with multiple displays:

a. Center the control below or to the right of the display area.

b. Group the displays in a line or matrix.

6.1.7 Observe the following guidelines when using a display selector:

a. Control position sequence should be consistent with display sequence.

b. Control position sequence and. display should have corresponding labels.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 24 6.1.8 If controls and displays are in separate planes:

a. Displays should be on adjacent upper panel from associated controls. (whenever possible)

b. Associated controls and displays should never be on facing panels.

6.2 CONTROL/DISPLAY RESPONSE 6.2.1 If there is a display response tine lag:

a. Displays should reflect in real time the time lag between actuation of the control and the change in system condition.

b. There should be no time lag between a system condition change and the display indication.

c. If there is a lag time between control actuation and ultimate system state, there should be an imediate indication of the process and direction of the parameter change.

6.3 CONTROL/DISPLAY ENHANCEMENT 6.3.1 Controls or displays that do not follow color or shape coding conventions should be identified and reviewed with the operators when that system is reviewed during training sessions.

6.4 TYPICAL SWITCH/INDICATOR CONFIGURATION 6.4.1 The switch/indicator light configurations as shown in Figure 6.4-1 should be used whenever feasible.

NELSTD ES-17, R-2 TEXT

Standard Lqo6: ES- 17 I Reviuion: 2 Paget 25 FIGURE 6.4-1 CONFIGUSATTONS TYPICAL SWITM/11MICATOR LIGOT I I

__

CF PUMS C I AUTO SVC AIRB COMPR" P52-COOIB.

r STOP START NELSTD ES-17. R-2 TEXT

Standard No.:' ES-17 Revision: 2 Page: 26 7.0 CONTROLS 7.1 GENERAL 7.1.1 All controls should meet the following criteria:

a. Sufficient ease of adjustment.

b. Sufficient range of control relative to the controlled parameter.

c. Required level of precision needed to meet normal transient and emergency operating procedure requirements (as applicable) without excess precision.

d. Operability in sufficient time, under expected dynamic conditions, and within the limits of manual dexterity coordination, and reaction time.

e. Sufficient durability to retain their appearance*

"ifeel,"f and functional characteristics during their service life.

f. Compatible with emergency gear.

g. Clear and direct display of control position.

7.2 COLOR CODING 7.2.1 Observe the following guidelines when using color coding:

a. Color coding can be used to provide unambiguous, easily discriminable information to the operator, and to aid in the following:

1. Perception of warning signals.

2. Identification of functional relationships.

3. Association of displays with related controls.

4. Organization of information.

5. Identifying probability or importance of events.

b. Follow the color coding conventions defined in Exhibit 7.2-1.1

c. Use color only to provide redundant information; the pertinent information should be available from some other source (e.g. label information).

d. Avoid using more than 11 colors for coding.

e. Narrowly define the meaning attached to a particular color.

f. The meaning of a particular color should be consistent throughout the control room, whether applied to panel surfaces or projected in signal lights or on CRTs, within and among systems.

g. Select colors that are recognizably different from each other.

Ii. Select colors that contrast well with the background on which they appear.

i. Evaluate each color selected for coding under all illumination under which it will be used; ambient lighting will influence the apparent color of the coded element.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 27 EXHIBIT 7.2-1 CONTROL COLOR AND SHAPE CODING Color Meaning Gray On Black Off

'White Auto Red Flag Start Green Flag Stop Red Switch/Red Border Emergency Gray Closed Black Open Gray Closed Black Open White Stop Gray Run Black Auto White Off/Reset Gray Manual Black Auto White Off Gray Stop button Gray Trip button Black Start button Sale Meaning Extended Handle Throttle Valve 7.3 SHAPE CODING 7.3.1 Observe the following guidelines when using shape coding:

a. Shape code controls that the operator must operate without looking (e.g., while observing a display).

b. Control shapes should be:

1. Visually identifiable

2. Tactually identifiable NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 7.4 DIRECTION OF MOVEMENT 7.4.1 Page: 28 Use the conventions in Tables 7.4.1 and 7.4.2 to determine I

the direction of movement of a control.

TABLE 7.4.1 CONTROL DIRECTION OF MOVEMENT CRITERIA o--

CONTROL ACTION w

ON _

START 000 RUN @ 001 1-U AUTO N -

on=000 0 N STOP -

CLOSE *@@@ 0 RAISE LOWER 0 INCREASE

0 0 DECREASE . __

IN 0 0 OUT -

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 29 TABLE 7.4.2 SWITCH POSITION CRITERIA NORMAL - INOPERATIVE NORMAL - RESET CLOSE - STOP - OPEN (Throttle Valves)

TEST - STOP - OPEN CLOSE - NORMAL - OPEN CLOSE - AUTO - OPEN NORMAL - OPEN NORMAL - TEST AUTO - STANDBY AUTO - RUN NORMAL - BYPASS OFF - TEST OFF - AUTO 7.5 CONTROL ENHANCEMENT 7.5.1 Prevent accidental activation of a control:

a. Locate the control where the operator will not strike or move it accidentally.

b. Recess, shield, or otherwise surround the control with a physical barrier so that the control is entirely within the envelope described by the recess or barrier.

c. Use a movable cover or guard; the guard should not interfere with the operation of the control.

d. Avoid safety or lock wires.

e. Use interlocking controls.

f. Make the control resistant to movement.

g. When a strict sequential activation is necessary, provide locks to prevent the control from passing through a position.

h. Use rotary action controls where linear or pushbutton controls would be subject to inadvertent activation and fixed protective structures cannot be used.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 30 7.5.2 To ensure the visibility of a control:

a. The control should be easy to locate.

b. The control setting should be easy to read, without parallax, from the operating position.

7.5.3 Provide some indication of activation for a control:

a. Physical feedback such as a position detent or snap feel.

b. Audible feedback such as a click or snap.

c. Integral light.

d. Pointer, if rotary control.

7.6 PUSHBUTTONS 7.6.1 Pusbuttons

a. Position pushbuttons in a logical order or in an order related to procedural sequence.

b. Use a slip-resistant or concave surface.

7.6.2 Legend Pushbuttons

a. Follow the criteria in Section 8.7.2, Legend Light Indicators.

b. Use barriers with rounded border edges when legend pushbuttons are contiguous.

7.7 KEYSWITCHES 7.7.1 Key-Operated Controls

a. Use Key-operated controls only where necessary for security. Avoid using key-operated controls, as a means for shaping coding.

b. Keys with a single row of teeth should be inserted into the lock with the teeth pointing up or forward (Preferred).

c. Keys with teeth on both edges should fit the lock with either side up or forward.

d. If possible and practical, orient locks so that the switch is OFF or SAFE when the key is in the vertical position.

e. If possible and practical, operators should not normally be able to remove the key from the lock unless the switch is turned to the OFF or SAFE position.

f. Label control positions.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 31 7.8 ROTARY CONTROLS 7.8.1 Continuous Adjustment Rotary Controls I

a. Use continuous adjustment rotary controls to ensure precise control along a continuous variable.

b. Use round knobs with knurled or serrated edges, to aid in gripping the control.

c. Use a pointer if an indication of position is desirable; if more accuracy is required, a line should be engraved and filled with a contrasting pigment both on the top and bottom sides of the pointer.

7.8.2 Rotary Selector Controls

a. Use rotary selector controls when three or more detented positions are required; they may also be used for two-position operation.

b. Provide detents at each Control position to ensure proper positive positioning and functioning of a discrete rotary control.

c. It should not be possible to position a control between detented positions.

d. A rotary selector control should not have more than 24 positions.

e. Provide stops at the limits of the control range to minimize the possibility of placing the control in an unused position.

f. Use a moving pointer and fixed position settings to maximize readability.

g. Provide position indication by one of the following methods:

1. Indicator lights.

2. A line engraved both on the top and bottom of the knob.

3..A pointer shape.

h. Mount pointers close to position settings to minimize parallax.

i. Knobs for spring-loaded, momentary contact, rotary selector controls should be large enough to be easily held against the spring torque, without fatigue, for as long as necessary to accomplish the control action.

(i.e. gloved hand operators on throttle valve controls). I NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 32 7.9 THUMIWBEELS 7.9.1 Thumbwheels should adhere to the following conventions:

a. Thumbwheel readouts should be visible from the thumbwheel operating-position. All readings should be direct without scaling or table lookup needed to determine the setting or position.

I

b. If the thumbwheel to used as an input device, code the OFF, zero, or normal position to facilitate visual recognition of status.

c. Provide a detent at the OFF position for feedback.

d. Thumbwheel controls that have discrete settings should be detented between positions.

7.10 SLIDE SWITHCES 7.10.1 Slide switches should have serrated or knurled surfaces.

7.11 TOGGLE SWITCHES 7.11.1 Toggle switches should have an elastic resistance that increases as the control is moved and decreases as the switch snaps into position.

7.12 ROCKER SWITCHES 7.12.1 Rocker switches should adhere to the following conventions:

a. Orient rocker switches vertically.

b. Activation of the upper part should control the ON or INCREASE function. Activation of the lower part should f control the OFF or DECREASE function.

c. In the ON position, the top of the switch should be flush with the panel surface.

NELSTD ES-17, R-2 TEXT

Standard No.:

Revision:

ES-17 2

I Page: 33 8.0 VISUAL DISPLAYS 8.1 GENERAL 8.1.1 All displays should meet the following criteria:

a. Capability to distinguish significant levels of the system parameter controlled.

b. Required level of precision, without excess precision.

c. Feedback for any deliberate movement of a control.

8.2 COLOR CODING 8.2.1 Use the following scale color coding convention:

a. Amber is used for out of normal operating range, but not in abnormal condition (e.g. pump coming up to speed).

8.3 DIRECTION OF MOVEMENT 8.3.1 Follow the conventions in Figure 8.3-1 to determine the direction of movement of a display.

8.3.2 Failure mode of instruments - Where possible and practical, provide indication of display failure (e.g.,

failure light or off-scale indication). A failed instrument which indicates an on-scale value, especially zero is not recommended.

FIGURE 8.3-1 DISPLAY MOVEMENT CONVENTIONS DIRECTION OF NUMBERING AND POINTER MOVEMENT FOR HORIZONTAL FIXED SCALES r0 to 20 30 40 40-I -W 30-t INCREASE 20 DIRECTION OF NUMBERING AND POINTER DIRECTION OF NUMBERING AND POINTER MOVEMENT FOR VERTICAL FIXED SCALES MOVEMENT WITH CIRCULAR SCALES NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 34 8.4 DISPLAY VISABILITY 8.4.1 To ensure the visibility of a visual display:

a. Displays should be easy to locate.

b. Displays should be easy to read, without parallax, from the operating position.

8.4.2 Limit information printed on the display face:

a. Include only an identification of the parameter displayed, the units shown, and any transformation required.

b. Omit unnecessary information and extraneous items such as patent notices or manufacturer's trademark.

c. Limit redundancy to cases where it is needed for backup or to avoid excessive operator movement.

d. Word messages as briefly as clarity permits.

e. Use the standard abbreviations and acronyms listed in Appendix A.

8.5 DISPLAY SCALES 8.5.1 Scale readings should relate in a direct and practical way to the operator's tasks.

a. Provide the degree of precision and accuracy needed.

b. Avoid conversions.

c. Use percentage indication only when the parameter is meaningfully reflected by percentage.

d. Provide for the display of all possible values:

1. Select scales that clearly indicate the critical parameters needed by the operators (e.g.

setpoints, action levels, etc...).

2. Select scales that span the expected range of operational parameters, or

3. Employ appropriate scale ranging techniques, or 4.. Support normal range displays with auxiliary wide-range instruments.

5. Provide numbers at the beginning and end points of the scale whenever possible. Upper end points should correspond to normally marked scale divisions or the next major subdivision, as shown in Figure 8.5-1.

e. A displayed value may be multiplied or divided by a power of 10, if the transformation is clearly marked on the display.

f. Minimize the display of normal random variations in display performance.

g. Use compatible scales for displays of the same parameter.

h. Avoid logarithmic scales, except where necessary for range and accuracy.

i. Avoid multiscale indicators.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 35 FIGURE 8.5.1 METER SCALE CRITERIA 150-140-180-120" 160-60- 4400 20-_

40 8.5.2 The specifications for several meter scales can be found on the drawings listed in table 8.5.2 TABLE 8.5.2 METER SCALE SPECIFICATIONS METER SCALE-DRAWING GE-180 J-7134 GE-185 J-7135 Rosemount Trip qu:nt 3-7135 Bailey Drum Recorder 3-7136 8.5.3 Scale graduations should conform to the following guidelines: (See Figure 8.5.3)

a. No more than nine graduations should separate numerals.

b. Major and minor graduations should be used if there are up to four graduations between numerals.

c. Major, intermediate, and minor graduations should be used if there are five or more graduations between numerals.

d. Successive values indicated by unit graduations should be in increments of 1, 2, 5, or 10 or those values multiplied by some power of 10. Increments of 1, 5 and 10 are preferred. However, increments of 2 are acceptable.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 36 F*G-URE 8.5.3 METER SCALE GRADUATION GUIDELINES GOOD FAIR VALUES INDICATED BY UNIT GRADUATIONS

- Successive values indicated by unit graduations should be one of those shown in the following table or those multiplied by some power of 10.

GOOD FAIR 1 2 4462 6 8 10 5 10 t5 20 2520 40 60 80 100.

10 20 30 40 50 0

8.5.4 Orient scale markings as follows:

a. Orient numerals vertically on linear and circular scales.

b. Where pointer movement is more than 360", the zero point should be located at the 12 o'clock position.

c. Where positive and negative values are displayed around a zero or null position, the zero or null point should be located at the 12 o'clock position.

d. Where the scale covers less than full rotation of the pointer, scale endpoints should be Indicated by a break in scale at least one number interval in length, oriented at the 6 o'clock position.

NELSTD ES-17, R-2 TEXT

Standard No.:' ES-17 Revision: 2 I.

Page: 37 8.5.5 Mark and color code out of normal operating ranges on meter scales as described in Section 8.2.

8.6 -DISPLAY POINTERS 8.6.1 Pointers on visual displays should meet the following:

a. Use simple pointer tips as shown in Figure 8.6.1

b. Select pointer tips to minimize concealment of scale graduation marks or numerals.

c. Where possible, pointer tip should extend to within I about 1/16 inch of, but not overlap, the smallest graduation marks on the scale.

d. Mount pointers so as to avoid parallax errors.

e. Pointer/background contrast and pointer size should be adequate to permit rapid recognition of pointer position.

f. Avoid moving-scale, fixed-pointer meters.

FIGURE 8.6.1 POINTER TIP CONVENTIONS ExwupI" of polnter TOps.

NELSTD ES-17, R-2 TEXT

Standard No.:' ES-17 Revision: 2 Page: 38 8.7 LIGHT IDMICATORS 8.7.1 Observe the following precautions when using light indicators:

a. To ensure the availability of light indicators, provide for rapid and convenient bulb replacement with power on and without hazard to personnel or equipment (to encourage immediate replacement of burned-out bulbs).

b. Ensure that reflections or -refractions from light sources do not cause light indicators to appear to be glowing when they are off or unlit when they are actually on.

C. Avoid misinterpretation:

1. System/equipment status should be inferred from illuminated indicators, never from the absence of illumination.

2. Provisions (design or procedural) should be made to prevent interchanging indicator lenses.

d. Avoid using light indicators to alert operators to unfavorable status; use annunciators.

e. Valve position indicating lights should be arranged such that GREEN (meaning closed) is on the left side and RED (meaning open) is on the right side.

f. Label indicator lights whose meaning is not apparent.

g. Light intensity should be at least 1OZ greater than surrounding panel. (Light intensity can be measured with a photometer.)

h. Color may be provided by a tinted cover glass or by a layer of colored material inside the cover according to the conventions in Table 8.7.1.

1. The color of the light should be readily identifiable.

J1. For valves with both a red and green position indicator light, fed by a limit switch, aid-position of the valve should be indicated by both indicators illuminated simultaneously. The green light Is Illuminated when the valve is not fully open and the red light is illuminated when the valve is not fully closed.

NELSTD ES-i?, R-2 TEXT

Standard No.:- ES-17 Revision: 2 Page: 39 TAB.U .7. 1 INDICATOR LIGHT COLOR CODING CRITERIA COLOR MEANING Red Valve open Red Breaker closed White Power available

&ad - Green Kid or transitional position Red On or operating Red Not secure Green Valve closed Green Breaker open Green Breaker trip Green Off or not operating Green Remote (or local only)

Green Trip or failure 8.7.2 Legend Light Indicators

a. General legend design should be consistent throughout the control room.

b. Light intensity should be at least 10Z greater than the surrounding panel.

c. Legends should be legKible under ambient illumination with the indicator light off.

d. Provide adequate contrast between lettering and background under ambient and traneilluminated lighting.

e. Symbolic legends should be unambiguous.

f.. If possible, limit text to no more than three lines.

g. Word legends to tell the status indicated by the gloving light.

h. Follow the lettering guidelines In Section 6.5 of NUREG-0700.

I. Distinguish legend light Indicators from legend pushbuttons using rounded corner borders.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 40 8.8 RECORDERS 8.8.1 Graphic Recorders

a. Use graphic recorders to record trend information and material that may be needed for later reference.

b. Ensure that pen, inks, and paper provide a clear, distinct, and reliable marking.

c. The recording paper and the recorder should use compatible scales.

d. See Section 8.5 for guidelines on scale design.

a. Provide a takeup spool and means for tearing off completed records.

f. Ensure the availability of expendables (paper, ink, etc.).

g. Paper and ink should be easy to replenish.

h. It should be convenient to annotate recordings with date, time, paper speed, parameter identification, etc.

i. Data should be visible through the window of the recorder.

J. Mark and color code abnormal operating zones as described in Section 8.2.

k. When possible, place recorders displaying critical information in the main control room or backpanel area for easy access when monitoring plant parameters.

NOTE: Continuous recorders provide pen-and-ink lines on the moving paper, one being dedicated full time to each channel that inputs to the recorder. Discrete recorders provide time-phase recording of a number of input channels, plotting them in sequence. Using a number-stamping device, they plot on the moving paper the instantaneous parameter value and the number of the channel it represents.

8.8.2 Continuous Recorders

a. Label the parameter recorded.

b. If using a multiple-pen recorder, list the parameters in the order of the associated scales on the recorder.

c. Use a different ink color for each pen; colors should be easily distinguished and provide good contrast with the paper.

d. Use pen colors uniformly throughout the Control Room where possible.

8.8.3 Discrete Recorders

a. Do not load the recorder beyond the designed channel capacity.

b. Identify the channel on the instrument.

c. Identify the channel on the recording medium.

d. Provide channel selection and indication capability.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 41 8.9 COUNTERS 8.9.1 Drum-Type Counters

a. Use drum-type counters when quick, precise reading of a quantitative value is needed and trend information is not needed.

b. Numerals should read horizontally.

c. Width-height ratio should be 1:1.

d. Separate numerals with commas and a decimal point if appropriate.

e. Provide contrast between the numerals and the background.

f. The surface of the drum and the surrounding area should be matte finish to minimize glare.

g- Mount the counter perpendicular to the operator's line of sight because of the restrictive viewing angle.

h. Mount the counter as close as possible to the panel surface to minimize shadows and maximize viewing angle.

i. Window size should allow only one digit at a time to appear.

j. Numbers should change by snap action, not continuous movement.

k. Counter drums should move upward with increasing values.

8.9.2 Electronic Counters

a. Numerals should read horizontally.

b. Use a simple character style.

c. Rate of change should be less than two per second.

d. Character-to-background contrast ratio should be sufficient to allow reading the counter under normal and emergency lighting conditions 15:1 (minimum) and 20:1 (preferred). I NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 42 9.0 ANITNCIATORS/VISUAL ALARMS Annunciators serve as an interface to alert the operator to out-of-tolerance changes in plant conditions. The annunciator system consists of three major subsystems: 1) an auditory alert subsystem,

2) a visual alarm subsystem, and 3) an operator response subsystem.

Together, these three should be designed to provide the operator with plant information needed to mitigate the consequences of plant transients without excessive effort, mental stress and time.

9.1 LETTERING 9.1.1 Annunciator lettering should meet the following criteria:

a. Letter height should subtend a minimum visual angle of 15 minutes, or .004 X viewing distance. The preferred visual angle is 20 minutes, or .006 X viewing distance.

b. Type styles should be simple.

c. Type styles should be consistent on all annunciator tiles.

d. Only upper-case type should be used on annunciator tiles.

e. Legends should be engraved, not hand written.

f. Annunciator lettering and spacing should meet the criteria in Table 9.1-1. See the examples in Figure 9.1-2.

TABLE 9.1-1 ANNUNCIATOR LEGEND LETTERING All Control Room Panels (Except IH13-P680)

1. Text Character Height: 3/16"

2. Text Character Width: 1/8"

3. Location Character Height: 3/64"

4. Character Width: 1/32"

5. Stroke Width: 1/32"

6. Minimum-Distance Between Characters: 1/32" 7.-Minimum Distance Between Words: 3/16"

8. Minimum Distance Between Lines: 3/32" Panel 1H13-P680

1. Text Character Height: 1/8"

2. Text Character Width: 3/32"

3. Location Character Height: 3/64"

4. Location Character Width: 1/32"

5. Stroke Width: 1/64"

6. Minimum Distance Between Characters: 1/64"

7. Minimum Distance Between Words: 1/8"

8. Minimum Distance Between Lines: 1/16" NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I Page: 43 FIGURE 917.-2 ANNUNCIATOR LEGENID LLTRING 1

1/4*"

_T{RHi/a" PU[RGEŽ3.fl LRWL I_, 1/8" T

COMPR B 3/32" TRIP 4--1/3'2"1 A Pfl70-10A(A-1)..,

1/3211 3/64"1 9.2 ALARMS 9.2.1 When establishing alarm set points:

a. Set points should be established to give operators adequate response time, as required.

b. Set points should not occur so frequently as to be considered a nuisance by operators.

c. When possible, alarms requiring a control room operator I to direct an auxiliary operator to perform a local operation should be avoided.

d. General alarms should be used only for conditions that allow adequate time for auxiliary operator action.

e. Inputs from more than one plant parameter set point should be avoided.

f. Where multi-input alarms must be used, an alarm printout I

capability should be provided, as appropriate to provide information needed by the operator, which could affect plant safety and availability.

g. For critical multi-input annunciator, reflash capability should be provided to allow subsequent alarms to activate the auditory alert mechanism and reflash the visual tile (even if first alarm has not cleared).

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 44 9.2.2 For first out alarms:

a. Alarms printed on the BOP Computer Alarm printout should print in the same order which they occurred.

b. In the event of a reactor trip, the trip sequence associated with the event should print out on the Sequence of Event (SOE) printer.

9.2.3 When prioritizing alarms:

a. Base prioritization on a range of importance, severity, or need for operator action in one or more dimensions (e.g., likelihood of reactor trip, release of radiation).

b. Visual signals for the various priority levels should be coded by color or location. f 9.2.4 For cleared alarms:

a. A dedicated, distinctive audible bell signal of finite duration should be used.

9.3 AUDITORY SIGNALS Auditory signals are used to attract operator attention and to present information independent of operator position or head orientation. Discrimination among these types of signals can be accomplished by using different frequencies, intensities, and temporal profiles. Auditory signals should rapidly penetrate the operator's awareness.

9.3.1 For auditory signals (see Table 9.3-1 for center frequency, bandwidth, and volume criteria):

a. Intensity should be such that operators can reliably discern the signal above ambient Control Room noise (10 dBA above ambient).

b. Signal intensity, if adjustable, should be controlled by administrative procedures.

c. The signal should capture the operator's attention but should not cause irritation or a startled reaction.

d. Signals should be adjusted to result in approximately equal detection levels at normal operator work stations in the primary operator area.

e. Auditory alert mechanism should be automatically reset when it has been silenced.

f. Separate auditory signals at each work station within the primary operating area are recommended.

NELsTh ES-I?, R-2 TEXT

Standard No.: ES-17 I Revision: 2 Page: 45 TABLE 9.3-1 TABLE 9.3-1 AUDIBLE ALARM CODING CRITERIA PANEL CENTER FREQUENCY BANDWIDTH VOLUME OF ALARMS*

P845 (ARMs) 250 Hz 200-300 Hz 77 dB P842 450 Hz 400-500 Hz 75 dB P855, P854 1000 Hz 950-1050 Hz 80 dB P856, P862 P680 1500 Hz 1450-1550 Hz 78 dB P870 2000 Hz 1950-2050 Hz 75 dB P601 2500 Hz 2450-2550 Hz 74 dB P807 3000 Hz 2950-3050 Hz 72 dB

Assumes Control Room ambient noise environment of 50 dB. Alarms should exceed ambient noise by 10 dB.

9.3.2 When using auditory coding:

a. Coding techniques should be used when the panel associated with the alarm is not in the primary operating area.

b. Coded signals from a single source should not be used to identify individual panels within the primary operating area.

9.4 VISUAL ALARMS Visual signals (i.e. flashing annunciators) are used to attract operator attention and present distinct information. These alarms can be discriminated by using different flash rates and colors.

9.4.1 For visual alarm recognition:

a. Tiles should use flashing illumination to indicate an alarm condition.

b. Flash rates should be from 3 to 5 flashes per second I with approximately equal on and off times.

c. A tile should illumilate and burn steadily in ease of flasher failure when in an alarm state.

d. There should be high enough contrast between illuminated and nonilluminated tiles, so that operators can discriminate between these conditions.

e. Avoid tiles which are illuminated under normal operating conditions.

NELSTD ES-17, R-2 TEXT

Stardard No.: ES-17 Revision: 2 Page: 46

f. If an annunciator tile must be energized for an extended period of time during normal operations it should be controlled by Administrative Procedure. (i.e.identifled in shift turnover records).

9.4.2 For annunciators on panels:'

a. The panels should be located above the related controls and displays that are required for corrective or diagnostic action In response to the alarm, whenever possible.

b. If lamp replacement requires tile removal, there should be a way to ensure that the tile is replaced in the correct location (i.e. Panel Arrangement Drawings)

c. Lamp replacement should not subject the operator to a shock hazard.

d. Operator aids should be provided if needed for lamp replacement (i.e. Electrical Devices List (EDL)).

9.4.3 When arranging visual alarm tiles:

a. Visual alarm tiles should be grouped by function or system within each annunciator panel.

b. Vertical and horizontal axes of annunciator panels should be labeled with alphanumerics as shown in Figure 9.4-1.

c.

d.

Coordinate designation is preferred on the left and top sides of the annunciator panel (See Figure 9.4-1).

Letter height for coordinate designation should be consistent with arrangement drawing labeling criteria.

If possible, the number of alarm tiles and the matrix I

e.

density should be kept low (a maximum of 50 tiles per matrix is suggested).

f. Tiles within an annunciator panel matrix should be grouped by subsystem, function, or other logical organization.

g. Blank or unused annunciator tiles should not be illuminated (except during annunciator testing).

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I Page: 47 FIGURE 9.4-i ANNUNCIATOR TILE CONFIGURATION V

9.4.4 For visual tile legends:

a. Annunciator visual tile legends should be specific and unambiguous. Wording should be in concise, short messages.

b. Alarms that refer the operator to another, more detailed annunciator panel located outside the primary operating area should be minimized.

c. Where possible, avoid tile legends which don't address specific conditions; for example, avoid using one alarm for HIGH-LOW, TEMPERATURE-PRESSURE.

d. Abbreviations and acronyms should be used whenever possible, and should be consistent with those listed in Appendix A.

e. Legends should be color coded according to the conventions in Table 9.4-2.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 I Revision: 2 Page: 48 TABLE 4.6-5 ANNUNCIATOR/VISUAL ALARM COLOR CODING CRITERIA COLOR MEANING Red with black letters Requires immediate response for any condition which may lead to a hazard to plant or public safety, such as a reactor scram signal/condition, ECCS/ESF initiation, isolation, or component trip.

Amber with black letters Requires immediate response for any condition, which if not corrected, may lead to a reactor scram signal/condition, ECCS/ESF initiation, isolation, or component trip.

White with black letters Conveys a system/component abnormal condition or trouble.

Light blue with black letters Conveys a logic permissive condition or system status such as manual override, manual initiation armed, switches in test, etc...

9.5 ANNUNCIATOR RESPONSE CONTROLS 9.5.1 For annunciator response controls:

a. Each set of operator response controls should include a silence control.

b. A control should be provided to terminate the flashing of a visual tile and have it continue at steady illumination until the alarm is cleared.

c. Acknowledgement should be possible only at the work station where the alarm originated.

d. If an automatic cleared alarm feature is not provided, a control should be provided to reset the system after an alarm has cleared.

e. The reset control should silence any audible signal (indicating clearance) and should extinguish the illumination.

f. The reset control should be effective only at the work station for the annunciator panel where the alarm initiated.

g. A control to test the auditory signal and flashing illumination of all tiles in a panel should be provided.

h. Periodic testing of annunciators should be required and controlled by administrative procedure.

i. Repetitive groups of annunciator controls should have the same arrangement and relative location at different work stations (i.e. Silence, Acknowledge, Reset, Test).

This is to facilitate "blind" reaching (see Figure 9.5-1).

NELSTD ES-17, R-2 TEXT

Standard No.:* ES-17 Revision: 2 Page: 49 J. Controls should be coded for easy recognition using techniques such am one of the following:

I. Color coding.

2. Color shading the group of annunciator controls.

3. Demarcation of the group of annunciator controls.

4. Shape coding, particularly the silence control.

Control designs should not allow the operator to defeat the control. For example, some pushbuttons used for annunciator silence and acknowledgement can be held down by inserting a coin in the ring around the pushbutton. This undesirable design feature should not be used.

FIGURE 4.6-6 ANNUNCIATOR CONTROL ARRANCEHM P

P

-- -- -- M I ANNUN P870 I

5 0 I NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 I Page: 50 10.0 ENVIRONMENT 10.1 CLIMATE 10.1.1 During normal plant operations Control room temperatures should be maintained within the ASMUJE "Comfort Zone" shown in Figure 10.1-1.

FIGURE 10.1-1 CONTROL ROOM WORKSPACE ENVIRONMENT

-A*hrae DRY-BULB TEMPERATURE cmnfot sbtmdW74 rwhofnw1le Swpift far Ilghtly ciotted. sedentary Indivldumls in spacts with low air nmovmet (le#0 than 45 FPM) 14ELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 51 10.1.2 Air temperature at floor level and a head level should not differ more than 10F.

I 10.1.3 Air velocities in the primary operating area should not exceed 45 feet per minute (fpm) measured at operator head I

level and should not produce a noticeable draft.

10.2 LIGHTING 10.2.1 The illumination levels, in footcandles, 10.2-1 are recommended:

shown in Table 1 TABLE 10.2-I RECOMMENDED ILLUMINATION LEVELS I:

WORK AREA OR TYPE OF WORK TASK ILLUMINANCE (IN FOOTCANDLES)

MIN RECOMMENDED MAX Panels, primary operating area 30 50 Auxiliary panels 20 30 50 Scale indicator reading 20 30 50 Seated operator stations 50 75 100 Reading:

Handwritten (pencil) 50 75 100.

Printed or typed 20 30 50 Writing and data recording 50 75 100 Maintenance and wiring areas 20 30 50 As Above Emergency operating lighting 10 for area/task (Source: Illuminating Engineering Society of North America, IES Lighting Handbook, 1981 Application Volume).

10.2.2 The level of illumination should not vary greatly over a given workstation.

I 10.2.3 Ensure supplemental lighting for personnel performing specialized visual tasks is available in areas where fixed lighting is not adequate (i.e. Flashlights, Lamps etc...).

10.2.4 Avoid illumination that will cause shadows and glare.

I 10.2.5 Do not exceed the task area luminance ratios listed in Table 10.2.2. The task area luminance ratio is the ratio between the level of lighting at the area the task will I

be completed versus the lighting level of the surrounding area.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 52 TABLE 10.2-2 RECOYMENDED TASK AREA LUMINANCE RATIOS AREAS LUMINANCE RATIO Task area versus adjacent darker 3:1 surroundings Task area versus adjacent lighter 1:3 surroundings Task area versus more remote darker 10:1 surfaces Task area versus more remote lighter 1:10 surfaces Luminaries versus surfaces adjacent 20:1 to them Anywhere with in normal field of view 40:1 10.2.6 Reflectance levels (measured in foot-lamberts) should conform to the guidelines in Tables 10.2.3 and 10.2.4.

TABLE 10.2-3 RECOMMENDED WORKPLACE REFLECTANCE LEVELS REFLECTANCE SURFACE PREFERRED PERMISSIBLE

Ceiling 80% 60-95%

Upper Wall 50% 40-60%

Lower Wall 15-20%

Instruments/Displays 80-100%

Cabinet/Consoles 20-40%

Floor 30% 15-30%

Furniture 35% 25-45%

Recommended reflectances are for finish only. Over-all average reflectance of acoustic materials may be somewhat lower. The upper walls (one to two feet below the ceiling) may be painted with the same paint as is used on the ceiling.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 53 TABLE 10.2-4 RECOMMENDED SURFACE COLOR REFLECTANCE LEVELS COLOR REFLECTANCE White ..................... 85 Light:

Cream ................ 75 Gray ................. 75 Yellow ............... 75 Buff ................. 70 Green ................ 65 Blue ................. 55 Medium:

Yellow ............... 65 Buff ................. 63 Gray ................. 55 Green ................ 52 Blue ................. 35 Dark:

Gray ................. 30 Red .................. 13 Brown ................ 10 Blue..s............... 8 Green ................ 7 Wood Finish:

Maple ................ 42 Stainwood ............ 34 English Oak .......... 17 Walnut ............... 16 Mahogany ............. 17 10.2.7 Surface colors should be recognizable under both normal and emergency conditions.

10.2.8 Emergency lighting is an alternate system that should automatically activate upon failure of the lighting in the control room. It should be independent of other plant lighting systems, and should meet the following guidelines:

a. Activate automatically and immediately upon failure of the normal Control Room lighting system.

b. Failure of the normal Control Room lighting system should not degrade operability of the emergency lighting system.

c. Emergency illumination should provide a minimum of 10 footcandles at all work stations in the primary operating area.

NELSTD ES-17, R-2 TEXT

Standard No.: ES-17 Revision: 2 Page: 54 10.3 AUDITORY ENVIRONMENT j 10.3.1 The auditory environment of the Control Room should adhere to the following standards:

a. Background noise should not impair verbal communications between any two points in the primary operating area.

b. Background noise levels should not exceed 65 dB(A).

c. Further reductions in background noise, or addition of sound powered phone Jack stations, may be required where communications between the primary operating area and other Control Room locations are necessary and no sound powered phone Jack stations are available.

d. Minimize noise distractions generated inside or outside j the Control Room.

e. The acoustical treatment of the Control Room should limit reverberation time to one second or less.

10.4 DECOR 10.4.1 The following features of the decor in the Control Room and break/eating facilities should be considered:

a. Color coordination.

b. Use of color and lighting to create a cheerful atmosphere.

c. Visual relief from arrays of instrumentation.

d. Comfortable seating.

e. Carpeting/padded flooring (durability).

11.0 Appendices 11.1 Appendix A - Standard Abbreviations and Acronyms.

NELSTD ES-17, R-2 TEXT

STANDARD ES-17 APPENDIX: A PAGE A-I REVISION: 2 I ES-17 APPENDIX A "STANDARD ABBREVIATIONS AND ACRONYMS" NELSTD ES-17 APP A COVER

STANDARD ES-17 APPENDIX: A PAGE A-2 REVISION: 2 I ES 17 APPENDIX - A REVISION STATUS SHEET PAGE REVISION STATUS PAGE REVISION PAGE REVISION A-I 2 A-7 0 A-2 A-3 A-4 2

2 1

A-8 A-9 A-10 0

0 2

I A-5 1 A-11 0 A-6 1 A-12 0 NELSTD ES-17 APP A COVER

STANDARD NO.: ES-17 APPENDIX: A PAGE A-3 REVISION 2 APPENDIX A. STANDARD ABBREVIATIONS AND ACRONYMS ABBREVIATION MEANING ABS absolute ABV above A/C Air Conditioning ACCUM accumulator ACKIN acknowledge ACT active/activated ADHRS Alternate Decay Heat Removal System ADJ Adjustment ADS Automatic Depressurization System AFT after AFTCLR aftercooler AH UNIT Air Handling Unit AIRB airborne ALM alarm ALT alternate AMPL amplifier ANAL analyzer ANNUN annunciator APRM Average Power Range Monitor ARI Alternate Rod Insertion ASSOC associated ATWS Anticipated Transient Without Scram AUTO automatic AUX auxiliary AVAIL available AVG average BAL balance BCV Bypass Control Valve BKW backwash BLDG building BLU blue BLW below BLWDN blowdown BOIL boiler BOP Balance of Plant BOT bottom BPC Bypass Control BRG bearing BRKR breaker BSCV Bypass Stop and Control Valve NELSTD ES-17 R-O APP A

STANDARD NO.: ES-17 APPENDIX: A PAGE A-4 REVISION 1 APPENDIX A (Continued)

ABBREVIATION MEANING BST booster BTFL butterfly BTRY battery BTV Bleeder Trip Valve BYP bypass CAB cabinet CAL calibration/calibrate CAV cavity CCW Component Cooling Water CF Control Fluid (*same as EHC)

CFM Cubic Feet per Minute CGCS Combustible Gas Control System CRAN channel CHAR charcoal CHEM chemical CHEMWST chemical waste CHG change CHILL chiller CHK check CHLD chilled CHLOR chlorination/chlorine CHRG charger/charging CIRC circulating/circulation CKT circuit CLG cooling CLNR cleaner CLOSE closed/closure CLR cooler CMPTR computer CNDCT conductivity CNDS condensate CNDSR condenser COLL collecting COMB combined COMPR compressor CONC concentration COND conditioner/condition CONF confirmed CONN connection CONT control CONTR controller CONV converter CO carbon dioxide C6L coolant CPLG coupling CRD Control Rod Drive CRT Cathode Ray Tube CSG casing NELSTD ES-17 R-O APP A

Standard No.: ES-17 Appendix: A Page A-5 Revision 2 APPENDIX A (Continued)

ABBREVIATION MEANING

~~C C nondens . _T'a Tue Cleaning System.[ SCN 03/0002 CTMT

containment CTR center CU Clean Up CUR current CV Control Valve CW Cooling Water d differential dP Differential Pressure dT Differential Temperature DD Diesel Driven DE Diesel Engine DEG degrees DESIC desiccation DET detected/detection DEV deviation DEWPT dew point

_...... [edwa_-_ Control Syst"m SCN 95/0001 DG Diesel Generator DGTL digital DIAPH diaphragm DIFF difference DISC disconnect DISCH discharge DIV division DMIN demineralizer DMPR damper DNSC downscale DOM domestic DR drain DRTR deaerator DRWL drywell DRYR dryer DSL diesel DVC device Deprss D elleChilled Water I SCN 03/0002 Depressr depressurization E east (EEL eccentricity CFL C --- I SCN 99/0001 EHC Electro-Hydraulic Control ELEC electric/electrical EMERG emergency ENCL enclosure ENG engine ENT enter EQUIP equipment ESF Engineered

D .............

SafetyJ Feature NELSTD ES-17 R-0 APP A Sc.'~' g~/COOZ~

"VA 031/too7 Standard No.: ES-17 Appendix: A Page A-6 Revision 2 ABBREVIATION MEANING EVAL evaluation EVAP evaporator EXH exhaust EXP expansion EXTR extraction F Fahrenheit FAIL failure FCV Flow Control Valve FDR feeder FH Fuel Handling FL front left FLO flow FLR floor FLTR filter FM from FO Fully Open FP Fuel Pool FPC Fuel Pool Cooling FPCC Fuel Pool Cooling and Cleanup FR front right, front FT foot / feet FUNC function / functional FW feedwater GD guard GEN generator GL gland GND ground GOV governor

,GR --- s--------_

Rgreen-red status light lamacoids)I SCN 03/0001 GRAD jradient GRN green HD head HDR header HEPA High Efficiency Particulate Air HI high HP High Pressure HPCS High Pressure Core Spray HPU Hydraulic Power Unit HTG heating HTR heater HTWL hotwell HVAC Heating, Ventilation, Air Conditioning HX Heat Exchanger HYD hydraulic HCU Hydraulic Control Unit mis . I SCN 98/0001 NELSTD ES-17 R-0 App. A

STANDARD NO.: ES-17 APPENDIX: A PAGE A-7 REVISION 0 APPENDIX A (Continued)

ABBREVIATION MEANING HYPCHL hyperchloride/hyperchlorinated H2 Hydrogen ICNDSR intercondenser INACT inactive INBD inboard INC incomplete INCM incoming INDIC indicator INDIV individual INFL influent INFO information INIT initiate/initiated/initial INJ injection INL inlet INOP inoperable/inoperative INPT input INSTR instrument/instrumentation INTK intake INTLK interlock INTRPT interrupt INVRTR inverter IP Intermediate Pressure IRM Intermediate Range Monitor ISOL isolation/isolator JT joint KV kilovolt L Left, lube LC Load Center LCS Leakage Control System LDS Leak Detection System LEAK leakage LFMG Low Frequency Motor Generator LIQ liquid LO low LOSCNT loss of continuity LP Low Pressure LPCS Low Pressure Core Spray LPRM Local Power Range Monitor LPSV Low Pressure Stop Valve LS Left Side LSS Load Sequencing and Shedding LTD limited LUBE lubrication LVL level NELSTD ES-17 R-0 APP A

65CAI q7-000o ,o 4.

-4F STANDARD NO.: ES-17 APPENDIX: A 41 ACHMENT ,-7 PAGE A-8 REVISION 2 TO oc~p eejo): I

,PAGE OF 5 APPENDIX A (Continued)

ABBREVIATION MEANING M/A MAINT manual - automatic maintenance I

MAN manual MAX maximum MCC Motor Control Center MD Motor Driven MECH mechanical MG Motor Generator MIN minimum MN main MOIST moisture MON monitor MOV Motor Operated Valve MSCV Main Stop and Control Valve MSIV Main Steam Isolation Valve MSL Main Steam Line MSR Moisture Separator Reheater MSV Main Stop Valve MTR motor MU Make-Up*

N north N Nitrogen NaG negative NORM normal NSSSS Nuclear Steam Supply Shutoff System 0 Oxygen OýA outside air OG Off Gas OOF OOSVC OPER out of file out of service operating/in operation I

OTBD outboard OTPT output OUTL outlet OVERCUR overcurrent OVERLD overload OVERRD override OVERSP overspeed PART particulate pushbutton t~'p ~ orL~~ ~~~

Precoat ;

PCW Primary Chilled Water PDISCH pressure discharge PDM pressure differential monitor PENETR penetration NELSTD ES-17 R-O APP A

STANDARD NO.: ES-17 APPENDIX: A PAGE A-9 REVISION 0 APPENDIX A (Continued)

ABBREVIATION MEANING PERMl permit/permissive PERS personnel PH phase pH pH PMP pump PMPHS pumphouse PNL panel POS position POT potential PREHTR preheater PREP prepare/preparation PRESS pressure PRI primary PRL parallel PROC process/procedure PROD product PROT protective/protection PSW Plant Service Water PT point PW Primary Water PWR power PWRLOSS loss of power R right RAD radiation/radioactivity RADWST radioactive waste RCDR recorder RCIC Reactor Core Isolation Cooling RCV receiving RCVR receiver RDL radial RE rear REC record RECIRC recirculating/recirculation RECOMB recombiner REDUC reduction REDUN redundant REF reference REFRIG refrigeration REFUEL refueling REG regulator/regulation REGEN regenerative REM removal RESVR reservoir REV reverse RFP Reactor Feed Pump NELSTD ES-17 R-0 APP A

sL4qqk'yA~ STANDARD NO.: ES-17 F-S51 APPENDIX: A PAGE A-10 P4 3o(3 REVISION 0 APPENDIX A (Continued)

ABBREVIATION MEANING RFPT RER Reactor Feed Pump Turbine Residual Heat Removal RHTR reheater RL Rear Left RLF relief RM room RMT remote RPS Reactor Protection System RPT Recirc Pump Trip RR Rear Right RS Right Side RTN return RWCU Reactor Water Cleanup RX reactor S South SANI sanitary SCV Stop and Control Valve SEC secondary SEL select/selector SENS sensor separator SEP sequence S~ i -

SFGD -safeguard S011T#OT SGTS Standby Gas Treatment System SHUTDN shutdown Sic signal SUAE Steam Jet Air Ejector SLC Standby Liquid Control SMP sump SMPL sample SOL solenoid SP speed SPCU Suppression Pool Cleanup SPLY supply SPMU Suppression Pool Makeup SPR spray SQRT square root SRM Source Range Monitor SRV Safety Relief Valve SS Seal Steam SSBV Seal Steam Bypass Valve SSC Seal Steam Control SSCV. Seal Steam Control Valve SSS Seal Steam Supply SSW Standby Service Water STA station NELSTD ES-17 R-0 APP A

STANDARD NO..: ES-17 APPENDUX: A PACE A-i1 REVISION 0 APPENDIX A (Continued)

ABBREVIATION MEANING STBY standby STO scage/staging STM steam STOR storage SU Start Up SUBLP subloop SUBST substitute SUCT suction SUM sumer SUPP suppression SUPV supervisory sV Stop Valve Svc service SW Service Water SWGR switcgebar SWYD switchyard SYNC synchronized SYS system TBCW Turbine Building Cooling Water TEMP temperature TERM terminal THR thrust THROT throttle TK tank TNL tunnel TOT total TRBY turbidity TREAT treatment TSE Turbine Stress Evaluator TURB turbine TURN turning TVR Thyristor Voltage Regulator TWa tower UNDERFREQ underfrequency MNDERVOLT undervoltage UPSC upscale V volt VAC vacuum VAC/VDC volts AC/volts DC VENT vent/ventilation VIBR vibration VLV valve VM Volt Meter VOL volume NELSTD ES-17 R-O APP A

STANDARD NO.: ES-17 APPENDIX: A PAGE A-12 REVISION 0 APPENDIX A (Continued)

ABBREVIATION MEANING VOLT voltage VOLTLOSS loss of voltage VR Voltage Regulator VSL vessel W West WC Water Column WR wear WST waste WTR water X exchanger XFER transfer XFMR transformer XOVER crossover XTIE cross tie NELSTD ES-17 R-0 APP A

v t e Letter Sequence Request
TAC:ME4679, Clarify Application of Setpoint Methodology for LSSS Functions (Open)
Initiation Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request Acceptance Supplement, Supplement Administration Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance Meeting Questions 26 January 2011 26 January 2011 27 January 2011 31 January 2011 8 February 2011 23 February 2011 23 February 2011 1 March 2011 16 March 2011 23 March 2011 23 March 2011 4 April 2011 5 April 2011 5 April 2011 12 April 2011 10 May 2011 20 May 2011 1 June 2011 6 June 2011 22 June 2011 29 June 2011 17 August 2011 6 October 2011 14 December 2011 14 February 2012 21 March 2012 18 April 2012 18 April 2012 Answers 31 March 2011 14 April 2011 5 May 2011 15 June 2011 6 July 2011 12 September 2011 10 October 2011 6 February 2012 15 February 2012 20 February 2012 13 March 2012 21 March 2012 5 April 2012 18 April 2012 Results Approval... Other: GNRO-2012/00150, Final Report for Replacement Steam Dryer, GNRO-2017/00039, Steam Dryer Visual Inspection Results for the First Two Scheduled Refueling Outages, ML102660403, ML111720830, ML112560396, ML12167A257, ML12167A269, ML12177A287, ML13108A217, NRC-2012-0105, Environmental Assessment and Finding of No Significant Impact Related Amendment Request for Extended Power Uprate to Increase the Maximum Reactor Core Power Operating Limit from 3898 to 4408 Mwt
MONTHYEAR2011-03-30 [Table View]

GNRO-2011/00016, Request for Additional Information Regarding Extended Power Uprate

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GNRO-2011/00016, Request for Additional Information Regarding Extended Power Uprate

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