ML20212P208
| ML20212P208 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 03/10/1987 |
| From: | Agosti F DETROIT EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| VP-NO-87-0043, VP-NO-87-43, NUDOCS 8703160027 | |
| Download: ML20212P208 (7) | |
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i March 10,1987 VP-NO-87-0043 U. S. Itaclear Regulatory Camission Attn _ Document Control Desk Washington, D. C. 20555
References:
- 1) Fermi 2 NIC Docket No. 50-341 NBC License No. NPF-43 2)
NIC Letter to Detroit Edison, " Audit of the Fermi 2 Detailed Control Room Design Review and Safety Parameter Display System Design," dated February 12,_1987
Subject:
Response to NIC Questions on the Safety Parameter Display System (!PDS) in Premaration for NIC Desian Audit
- As requested in Reference 2, Enclosure 1 is submitted in response to the questions from the NIC in preparation for the SPDS design audit.
Should you have any questions, please contact Ms. Evelyn Madsen at (313) 586-4205.
Sincerely,
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i Enclosures cc: Mr. A. B. Davis Mr. E. G. Greenman l
Mr. W. G. Rogers Mr. J. J. Stefano A003 4
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RESPONSE TO NIIC QUESTIONS l
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s DETROIT EDISON March 19,87 1
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Page 1 s
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. SAFETY PADAKETER DISPLAY SYSTEM EMERGENCY RESI'ONSE INFORMATION SYSTEM s
The Safety, Parameter Display System (SPDS) is an A
integral'.part of the Emergency Response Information System (ERIS).
SPDS is defined.as those functions available through the programmable function keys and orogram definable function keys shown in Figure 1.
- 1. NRC Outstion On whattdate was the SPDS declared operational
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and what was the basis for, scheduling that operhtional date (NRC Order, FSAR commitment, t'
etc.)7 If not operational, on what date will
'the SPDS become operational?
Response
I Ths Fermi 2 SPDS was declared operational December 31, 1985 in accordance with Edison letter VP-85-0235, dated Decehber 31, 1985 in response to License Condition 2.C(17) i,
Item 4, NRC License No. NPF-43 l
-.2'.. NBC Ouestion On what date was,the Verification and L
validation program for the SPDS completed?
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Response
l Verification epd Validation (V&V) testing of the SPDS functions defined as' necessary for i
operation was ; essentially completed, the j
results analyzed, and deviations identified (trouble reports) when the system was declared operational.. Items identified just prior to l
the operational date, with the exception of l
those items identified as long range or enhancements, were completed by March 31, l
1986.
Written test reports and aSalyses will l
be completed by March 31, 1987.
The V&V Report summarizing the V&V program will be completed by June 30, 1987.
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Enclocurc 1 -
VP-NO-87-0043
.Page 2 a
- 3. NBC Cuestion d
'Were. t.he plant operations' staf f trained in the use of the SPDS equipment and are there SPDS
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procedures available to them?
Response
Control Room personnel were trained in the operation of SPDS prior to December 31, 1985.
A standard operating procedure and a users manual are available.
- 4. NBC Ouestion Has DECO reviewed the SPDS design against
. problems identified in IE Information Notice 86-10?
Have there been simila.: problems experienced with the Fermi 2 design?
Responsq Detroit Edison has reviewed the SPDS considering the major deficiencies identified in Information Notice 86-10.
Those' items discussed in IE 86-10 were not found to be major deficiencies in the Fermi 2 SPDS as an operational system.
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- 5. NRC Ouestion Are the SPDS procedure incorporated with the i
plant Emergency Operating Procedures?
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Response
SPDS is not incorpbra ed in the plant Emergency Operst/c a '; ocedures (EOPsi.
The curves from th? 1031 3 re incorporated in SPDS.
- 6. NRC Ouestion 1/
Who is the primary user of the SPDS equipment L
at Fermi 2?
Responso y;
The Contrdi Room personnel and the emergency response personnel assigned to the Technical Support Center and Emergency Operations Facility are the primary users of the SPDS during an emergency.
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VP-NO-87-0043 l
Page 3
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- 7. EEC Ouestion in Assuming the SPDS is operational, have modifications been made since the' system was declared operational and on what were-the
- modifications made?
Response
Three SPDS softwaro' functions have been modified since it was declared operational.
These modifications were made in accordance with the Engineering Design Package (EPD) process and are briefly described below:
a The " rate-of-change" algorithm associated o
with-the numerical values shown on the SPDS displays was godified, to represent rate-of-change per minute values rather than rate-of-change.per second values.
The rate-of-change per _ second values flashed on and of f the screen too ' rapidly for the numbers to be of value to the user.
o The 10-second delay that occurred prior to initiating an SPDS green / red status box based on high RPV pressure was removed.
L The color change is now initiated immediately upon sensing an RPV pressure l
greater than-the setpoint value.
o The processing used to initiate an SPDS green / red status box based on loss of RPV pressure at a rate greater than 10 psig per second was removed.
It was determined that this color change was extraneous and could cause operator confusion.
- 8. NBC Ouestion Does the Fermi 2 plant operations staf f find that the SPDS makes their jobs easier?
If so, how?
If not, why not?
Response
The SPDS is an integral part of ERIS and is defined in Figure 1.
The SPDS displays, for the most part, are static in nature unless the plant is in an accident situation.
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Enclosure to VP-NO-87-0043 Page 4 However, many of the functions on ERIS enable the Control Room personnel to use the system as they perform their daily routines.
This capability does not interfere with the capability of the SPDS functions to alert the.
operator to a possible accident condition in the plant.
- 9. NBC Ouestion Describe to what extent the plant operations staff is using or relying upon information provided by the SPDS?
If the SPDS information is not relied upon, why not?
Response
NUREG-0737, Supplement 1, states that
" operators should be trained to respond to accident conditions both with and without SPDS." Control Room personnel are trained to use SPDS as an aid during accident conditions and are cautioned to verify the data with the instrumentation in the Control Room.
The ERIS functions the Control Room personnel may use on a daily basis have inputs from SPDS points and are relied upon to provide useful information to the operator.
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