ML20137X367
| ML20137X367 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 02/20/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-948, NUDOCS 8603060134 | |
| Download: ML20137X367 (8) | |
Text
t' O
I SEABROOK STATION Engineering Office i
Pub 8c SeMce of New AW W
New Hampshire Yankee Division February 20, 1986
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SBN-948 T.F. B7.1.2 f:p/c United Statec Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter (SBN-914), dated December 27 1985, " Detailed Control Room Design Review (DCRDR) at Seabrook Station (SER Outstanding Isaue No. 19)," J. DeVincentis to V. S.
Noonan
Subject:
Detailed Control Room Design Review (DCRDR) at Seabrook Station (SER Outstanding Issue No. 19)
Dear Sir:
Enclosed please find Attachment 1 which provides revised resolutions and additional clarifications to address the remaining DCRDR concerns identified in our telecon of January 23, 1986 with the Staff. It should be noted that the enclosed also confirms our telecon of February 10, 1986 with the Staff.
Based on our discussions with the Staff regarding the acceptability of the enclosed, we believe that it completes our response to the above referenced SER outstanding issue. Accordingly, we request that the resolution of this issue be reflected in the next supplement to Seabrook Station's SER.
Very truly yours, John DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List 8603060134 960220.
{DR ADOCK 05000443 PDR 0
' I P.O Box 300 Seabrook.NH03874 Terephone(603)474 9521 J
Willico S. Jcrdan, III Donald E. Chick-Diane Curran Town Manager Harmon, Weiss & Jordan Town of Exeter 20001 S. Street, N.W.
10 Front Street Suite 430 Exeter, NH 03833 Washington, D.C.
20009 Brentwood Board of Selectmen L
Robert G. Perlis RED Dalton Road Office of the Executive Legal Director Brentwood, NH 03833 U.S. Nuclear Regulatory Commission Washington, DC 20555 Richard E. Sullivan, Mayor City Hall Robert A. Backus, Esquire Newburyport, MA 01950 116 Lowell Street P.O. Box 516 Calvin A. Canney Manchester, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 Dana Bisbee, Esquire i
Mr. John B. Tanzer Assistant Attorney General Designated Representative of Office of the Attorney General the Town of Hampton 208 State House Annex 5 Morningside Drive Concord, NH 03351 Hampton, NH 03842 Anne Verge, Chairperson 1
i Roberta C. Pevear Board of Selectmen
- Designated Representative of Town Hall the Town of Hampton Falls South Hampton, NH 03827 Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensingcon RFD 1 Carole F. Kagan, Esquire East Kingston, NH 03827 Atomic Safety and Licensing Board PaneA U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General i
Environmental Protection Bureau Mr. Angi Machiros Department of the Attorney General Chairman of th4 Board of Selectmen One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 Newbury, MA 01950 Senator Gordon J. Humphrey Town Manager's Office U.S. Senate Town Hall - Friend Street Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Burack)
Senator Gordon J. Humphrey Diana P. Randall 1 Pillsbury Street 70 Collins Street Concord, NH 03301 Seabrook, NH 03874 (ATTN: Herb Boynton) 1 H. Joseph Flynn Office of General Counsel Federal Emergency Management Agency 500 C Street, SW Washington, DC 20472
4 SBN-948 ATTACHMENT 1 Revised Resolutions / Additional Clarifications VI.A 14 There is a need for a sensitive containment pressure (scale 0-5 psi) indicator on the front panel to read to one-half (1/2) psi as required by emergency operating procedures.
Original Resolution "There is presently an indicator on the back panel. This will remain there.
A narrow-range indicator will be added to Panel BF adjacent to the existing containment pressure indicator, (Priority 1B).
Revised Resolution Further study indicates that the procedure calls for verification that the containment pressure is less than the Hi-1 setpoint. This point is 4.3 psi and can be read on the 0-60 psi indicator which is presently provided. As stated in the resolution to HED VI.T.1, the operators will be instructed that the procedure "setpoints" do not have to be read as exact values. Therefore, there is no need for a narrow-range indicator. Accordingly, this item is no longer classified as an HED.
Clarification Requested Explain how operator will read the indicator (i.e., accuracy of reading; are tolerances provided in pro-:edure).
Response
We have previously committed to banding indicators by the end of.the first refueling outage. As indicated in our revised response to VI.T.1, provided below, we will identify (i.e., mark) the procedure setpoint during banding of this indicator.
VI.L.1
' Clarification Requested In the status of the resolution and implementation schedules for hardwired annunciators (Reference SBN-839, Attachment 5) for Item VI.L.1, " Hardwired Alarms; Grouping of Tiles Witnin Boxes," it was indicated that the "necessary changes" have been made. Please clarify what changes were made or provide implementation schedule regarding the items discussed in Attachment 5 for VI.L.l.
Response
The grouping, placement, and wording was reviewed. The resolutions identified as a result of this review were 'prioritized (i.e., 2A, potentially affecting safe plant operation, 3A/3C - operator convenience). Those resolutions prioritir.ed 2A and 3A have been implemented. Those identified as 3C will be implemented by the end of the first refueling.
I
SBN-948 The following 10 a list cf canuncister changts mada as a result of the absva referenced review:
1.
Addition of new alarms for:
(Priority 2A) a.
Main Steam Isolation
-b.
Feedwater Isolation c.
Computer Failure d.
RHR Low Flow - Train A e.
RHR Low Flow - Train B.
2.
Delete Alarms for:
(Priority 3A) a.
Steam Generator Pressure High/ Low b.
Subcooling Margin Low c.
Incore T/C Temper '.ure Hi h.
F 3.
Revision of alarm me.aages on tiles for consistency / clarity.
(Priority 2A) 4.
Increased letter size from 1/4" to 5/16".
(Priority 2A) 5.
Revision of input logic to the " Instrument Air Pressure Low" alarm.
(Priority 3A)
The following is a list of annunciator changes
- planned for the first refueling:
1.
Relocate alarms for:
(Priority 3C) a.
Containment IA Pressure Low b.
PCCW Head Tank B - Level Low c.
PCCW Train B - Flow Low.
2.
Revision of the input logic to add Train B inputs to alarms for:
(Priority 3C) a.
RWST Level Lo-Lo b.
Containment Pressure Hi-1 c.
Containment Pressure Hi-3.
3.
Combine the following two alarms into one alarm:
(Priority 3C) a.
RCP Coolers Train A PCCW Flow Low b.
RCP Coolers Train B PCCW Flow Low.
4.
Add alarm for SSPS General Warning Alarm, Both Trains - Reactor Trip.
(Priority 3C)
VI.L.2 Tiles can be read easily when standing directly in front of the corresponding box. However, when standing at the Silence-Acknowledge Stations at Panels B and H, there is some ditficulty in reading some of the tiles acknowledged from those stations partly because of angle of view, partly because of distance.
SBN-948 RTalution The hardwired annunciators are a backup to the CRTs. The letters have been increased in size to 5/16 inch to improve readability of the tiles and this resolves the issue (Priority 3A).
Clarification Requested Please provide additional information regarding readability of tiles (i.e.,
viewing angle).
Response
When measured from the operating station directly in front of the lamp boxes, the minimum guidelines value is exceeded in all cases. When measured from the Acknowledge-Station, all but one box meets or exceeds the minimum guideline of 15 minutes of arc. The viewing angle for this one box is 12 minutes of arc.
VI.T.1 In many cases in the procedures, the operator cannot read the indicator to the accuracy presently implied by the procedure, and no tolerance is allowed in the value to be read.
Resolution The "setpoints" for operator action in the procedures are the same as the applicable instrument setpoints. The instrument setpoints are specified to a high accuracy to meet the accident analysis. Since operator action does not require the fast response required to meet an accident analysis, the "setpoint" for operator action does not require the same accuracy as the instrument setpoint.
We will indicate the approximate location of the procedure "setpoint" as part of the indicator banding (Priority 2C).
The operators will be instructed that the procedure "setpoints" do not have to be read as exact values (Priority 2A).
Revised Resolution In order to preclude any concern of reading the indicator (i.e., what accuracy), we will, as part of the indicator banding, identify (i.e., mark) the procedure setpoint. This banding of indicators is to be done by the end of first refueling per a previous commitment.
It should be noted that the "setpoints" for operator action in the procedures are the same as the applicable instrument setpoints. The instrument setpoints are specified to a high accuracy to meet the accident analysis. Since operator action does not require the fast response required to meet an accident analysis, the "setpoint" for operator action does not require the same accuracy as the instrument setpoint. Therefore, marking setpoint on banding will be adequate for operator action.
SBN-948 VI.U Use of Color on CRTs The evaluation regarding the use of color (Reference SBN-914, Attachmeet 4) has been further discussed and reviewed based on Staff comments. This has led to a change in the descriptica of the resolution of HED VI.U.1, and the identification of a new HED, VI.U.4.
VI.U.1 The lack of the color red and the use of the color yellow as first priority with orange as third priority for the VAS CRT is inconsistent with the color scheme used on the CRTs used in the Control Room.
Resolution The grouping of alarms and the VAS color scheme will be revised as follows:
1.
Of the current priority 1 alarms, only the reactor trip and first out alarms will remain priority 1.
These alarms will be displayed in red on the VAS.
2.
The remainder of the current priority 1 alarms will be recategorized as priority 2.
These alarms will be displayed in yellow on the VAS.
3.
The current priority 2 and 3 alarms will be combined into a new grouping, categorized as priority 3.
This new grouping will be displayed in cyan on the VAS.
This resolution addresses dhe concern regarding color inconsistency, but still recognizes the superior visibility of yellow and cyan for the situation when many alarms appears. These changes will be made prior to commercial operation.
VI.U.4 On the graphics CRT, a yellow question mark indicates that uncertain information is present with respect to a component or value.
On the RDMS CRT, magenta indicates that uncertain information is present.
Resolution The graphics CRT will be changed. The indication for uncertain information will become a magenta question mark. This will make the graphics CRT consistent with the RDMS CRT (Priority 3C).
Note:
Figure 1, provided with SNB-914, has been revised to' agree with the above described changes to VI.U.
Figure 2 (Page 2 of 2), also provided with SNB-914, has Feen revised to add a note clarifying the red / white switches. Both of these revised figures are included herewith.
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SBN-948 Page.1 of 1 FICt4tE 1 Use of Color on control Room CRTs Dark Red Oranse Yellow Creen Cyan Blue Waite Mosenta VAS 1
2 3
Reset (First Out &
Reactor Trip) i Hardwired j '
Annunciator First Out All Other System Alarms SPDS 1
2 3
4 RDMS 1
Labels 2
Reset Uncertain Information Craphics Active Insctive Analog Lines Inter-Uncertain Information mediate Information Values VAS Heading Messages Recommended
Background
Action Note: Priorities - 1. 2, 3, 4 w
..ea, yg g
SBN 948 Page 2 of 2 FICURE 2 Use of Color on Seabrook Control Board Color COLORS:
Coding Orange L1sht Catesory Red (Amber)
Yellow Creen Blue Blue Magenta Brown White Black Cray Computer Erase, etc.
Paging Erase, etc.
Management Acknowledge Channel (General Alphanumeric Key)
Keyboards Abnormality.
Levels:
Misc.
Hardwired First Out Al*res Indicator Temperature Pressure Level Flow Misc.
Type Demarcation Demarcation, Csnsric Labels MCB Manchester Unlisted T212 phones
- NRC Emergency Exit and Number Notification System Dispatcher (E-Plan)
(ENS)
Nots: Switches that are Red with White Stripes or White with Red Stripes indicate Dual Train Switches.
.