ML20117G218
| ML20117G218 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 03/12/1985 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20117G150 | List: |
| References | |
| 0089K, 1BOS-3.1.1-11, 4637P, 89K, NUDOCS 8505130456 | |
| Download: ML20117G218 (4) | |
Text
E IBOS 3.1.1-11 L uision 3 81 MONTHLY, STAGERED BASIS, REAGTON .
- UREAKER SHUNT AND UNDERVOLTAGE TRIP INDEPENDENCE TES1 - TRAIN B A. STATER.ENT OF APPIICsBILITY; The purpose of this procedure is to verify the opration of the shunt trip and the undervoltage trip of the Train B Reactor Trip Brkr and 'm Train A Rx Trip bypass Brkr in Modes 1, 2, 3*, 4*, and 5* every 62 days and after maintainence or adjustment of the Reactor Trip Brkrs. Completion of the entire surveillance will insure the compliance with the Table 4.3-1 Note 11 (18 month Independent Verification of both undervoltage and shunt trips actuation requirements).
- With the Reactor Trip Brkrs closed and the Control Rod Drive System capable of Rod Withdrawal. >>-
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REFERENCES:
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- 1. Technical Specifications 3.3.1. 33;
- 2. Westinghouse Solid State Protection System Vendor's manual F-108.
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- 3. 6/20 E-1-4030RD06 me:
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- 4. 6/20 E-1-4030RD0/ C' q]3
- 5. 6/20 E-1-4208A h~
- 6. 6/20 E-1-42088 C2::
- 7. 6/20 E-1-4030EF67 O
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- 8. 6/20 E-1-4030EF/3 C. PREREQUISITES: .
- 1. Receive permission from the Shift Engineer or designated SRO licensed assistant prior to performing this surveillance by having the Data Package Cover Sheet signed and dated.
- 2. Commis..i. ntions must be established between the main control room, the auxiliary electrical equipment room (IPA 10J) and the reactor trip switchgear panel (1RD05E).
- 3. Test Equipment,
- a. Pushbutton switch with leads.
D. PRECAUIIONS;
- 1. This surveillans" ony be performed on Rev Lor Trip Breaker B and Bypass Trip Breaker A only.
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- 2. No radio communications shall be used in the Ara;I;ary Electrical Equipment room.
- 3. This procedure will open Reactor Trip Breen. 1. Bypass Trip Breaker B must be closed during execution of steps 4 through 18 to avoid a reactor trip.
E. LIMITATIONS AND ACTIONS:
- 1. In the event that the acceptance criteria is not met during the performance of this surveillance, IMMLDIATELY notify the Shift Engineer to initiate LC0AR 180S 3.1-la.
- 2. The two hour time limit for surveillance testing begins when Reactor Trip Bypass Breaker B (BYB) is racked to CONNECT position and CLOSED.
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- CAUTION 'N 7
- 00 NOT PROCEED WITH THIS PROCEDURE UNLESS THE GENERAL g M WARNING ANNUNCIATOR 04803 IS CLEAR *
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- 1. VLRIFY that MCB General Warning annunciator 04803 is CLEAR ,
UNDERVOLTAGE TRIP
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- 2. VERIFY / RACK to CONNECT and CLOSE Reactor Trip Breaker - B (RTB) at N 1RD05E. W
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- 3. RACK to the TEST and CLOSE Reactor Trip Bypass Breaker A (BYA) at 1RD05E. r- -
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- NOTE '-
- The two hour timr limit for surveillance testing begins Egh T
- when the Train B Reactor trip byposs Lreaker is racked N
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- to CONNEC1 and CLOSED.
xxxxxnxxxnunxnouxxxnxxxmxxxxx. xnxxxxxxxxxnxx , xxxxx x g g hD < 4. RACK to CONNECT and CLOSE. Reactor Trip Bypass Breaker B (BYB) at pt 1RD05E and record the time. TIME:
- 5. PLACE the " Logic A" Test Switch at IPA 10J, Logic Test Panel in position 7.
(6. DEPRESS and HOLD any two of the four Manual Test Input push buttons at IPA 10J Logic Test Panel to actuate the Undervoltage Trip .ud VERIFY the following:
- a. Reactor Trip Breaker B (RTB) is OPEN at 1RD05E.
- b. Reactor Trip Bypass Breaker A (BYA) is OPEN at 1RD05E. ;
I (4637P)
I PART II BRAIDWOOD STATION Item 2.1-Applicant needs to submit detailed information describing its vendor interface program for reactor trip system components. Information supplied should state how the program a. ures that vendor technical information is kept complete, current, arid controlled throughout the life of the plant and should also indicate how the program will be implemented at Byron /Braidwood.
Response
Braidwood's VETIP program is currently under development. An administrative procedure, BwAP 1340-5. has been written, and is currently undergoing the station's review process. This procedure has been written to implement the Nuclear Stations Division Directive MO-2, Control of Vendor Equipment Technical Information.
This procedure applies to both safety related and non-safety related equipment. BwAP 1340-5 prescribes that all vendors manuals, safety-related and non-safety related, be controlled by the Central Files Supervisor. All satellite files are likewise controlled. It defines'the review criteria, including effects on station procedures, for vendor initiated revisions to equipment manuals.
Also addressed in this procedure is the vendor manual update process, which is initiated when a plant modification is undertaken.
Item 2.2.2 Applicant needs to present its evaluation of the NUTAC program and describe how it will be implemented at Byron /Braidwood. The staff found the NUTAC program fails to address the concern about establishing and maintaining an interface between all vendors of safety-related equipment and the utility. Accordingly the applicant will need to supplement its response to address this concern. This additional information should describe how current procedures will be modified and new ones initiated to meet each element of the item 2.2.2 concern.
Response
CECO's representative in the NUTAC program was from Nuclear Stations Division, a Corporate level organization. To implement the Vendor Equipment Technical Information Program at each nuclear station, NSD issued a directive, NSDD-M02, based on the NUTAC program and INPO l
1
- m 3
Good Practice MA 304. The directive defines the minimum requirements for implementation of the program and serves as our corporate statement on the control of vendor information. A copy is attached at the end of Part I for your review.
In addition, Braidwood has a formal review process established for vendor-initiated notices (Technical Bulletins, O&MRs, ets.) This process serves to alert responsible station departments to the most current vendor information available. The modification of procedures based on vendor input is described in BwAP 1340-5.
Item 4.5.2 Applicant needs to describe design modifications that will permit on-line test of the RTS and provide an implementation schedule.
Response
Braidwood Station was designed with on-line test capabilities.
The RTS design modification which the station has committed to, the Westinghouse automatic shunt trip, will also have this capability.
The Braidwood Reactor Trip System employs two diverse trip features an undervoltace trip and a shunt trip. Any time a reactor trip signal is generated, power is removed from the undervoltage trip attachment which in turn will trip the reactor trip breaker. In addition, the shunt trip relay will be energized to supply the breaker >with a redundant trip.
The system is designed such that on-line testlag is accomplished through the use of a bypass breaker in parallel with the main trip breaker. When testing is performed, the bypass breaker is placed in the connect position and the main breaker is placed in the disconnect position. With the main trip breaker out-of-service, both undervoltage and shunt trip devices can be tested. During this testing, the bypass breaker can be tripped by similar undervoltage and shunt trip devices.
As1can be seen by the above description, modifications will be made to enable Braidwood to accomplish on-line testing of reactor trip breakers._ The only design modification is the addition of the shunt trip-coil, but it should be noted that replacement undervoltage trip attachments are being supplied by Westinghouse for installation at Braidwood.
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