ML20216G011
| ML20216G011 | |
| Person / Time | |
|---|---|
| Issue date: | 09/30/1999 |
| From: | Spaulding D, Waterman M Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-1706, NUDOCS 9909270206 | |
| Download: ML20216G011 (48) | |
Text
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I NUREG-1706 Year 2000 Reaciness in U.S. Nuclear Power
. Plants A.A a
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U.S. Nuclear Regulatory Commission ~~%s, Office of Nuclear Reactor Regulation [ 1 Washington, DC 20555-0001
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Year 2000 Readiness in U.S. Nuclear Power Plants g, i
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U.S. Nuclear Regulatory Commission / "*%,
Office of Nuclear Reactor Regulation [)
Washington, DC 20555-0001 \,
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)
Year 2000 Readiness !
in U.S. Nuclear Power l Plants 1
l i
Manuscript Completed: September 1999 }
Date Published: September 1999 !
I i
Prepared by M.E. Waterman, D.W. Spaulding ;
Division of Engineering ,
Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Wcshington, DC 20555-0001
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ABSTRACT The NRC staff has assessed the year 2000 systems and digital embedded components (Y2K) readiness activities ofits nuclear that support plant operations are "Y2K power plant licensees. The staff then ready." Licensees of the remaining 28 plants integrated those findings with the July 1, have additional work to complete on a few 1999, licensee responses to Generic Letter non-safety-related systems or components (GL) 98-01, Supplement 1, " Year 2000 that support plant operations and Readiness of Computer Systems at Nuclear administrative functions. These licensees Power Plants," and licensee followup reports submitted dates for completing Y2K on Y2K readiness. All licensees of NPPs readiness at their plants. The staff will verify reported in response to GL 98-01,- completion of the remaining Y2K items at Supplement 1, that there are no Y2K-related each of these 28 plants. Typically, the problems that directly affect the performance licensee is completing the remainingY2K of safety systems. The Nuclear Regulatory work after July 1,1999, because the work Commission has confirmed by onsite reviews requires a plant outage scheduled for the fall that at all 103 U.S. nuclear power plants there of 1999 or because the licensee is waiting for are no Y2K-related problems that affect the delivery of a replacen ent component. All !
performance of safety systems needed to plants are expected to be Y2K ready by l safely shut down the plants. As of December 16,1999. The stafTdoes not :
September 1,1999, the staff finds that anticipate directing any plant-specific l licensees of 75 of the 103 plants have regulatory actions.
completed all activities to ensure computer l iii NUREG-1706
CONTENTS Page AB S TRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii EXECUTW E S UMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii AC KNOWLEDGMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi AB B REVI ATION S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii 1 INTROD UCTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I 2 B A C KG RO UN D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 REVIEW AND INTEGRATION APPROACH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.1 Site Review Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Integration Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 REVI EW RE S ULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.1 Assessment of NPP Licensee Y2K Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.2 Review of Licensee Responses to GL 98-01, Supplement 1 . . . . . . . . . . . . . . . . . 10 5 FUTURE ACTIVITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6 CO N C L U S ION S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figures Figure 1. NRC Activities Related to NPP Y2K Readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Systems and Components Remaining to be Remediated . . . . . . . . . . . . . . . . . . . . . 13 Figure 3. Status of NPP Y2K Readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Tables Table 1 NPP Y2K Readiness Status as of September 1,1999 ......................... 18 Table 2 NPP Systems and Components Requiring Completion of Year 2000 Readiness Activities as of September 1,1999 ........................................ 22 v NUREG-1706
r EXECUndi
SUMMARY
This report provides the status of nuclear or administrative systems. Most NPP safety power plant (NPP) Year 2000 (Y2K) systems that ensure an NPP is maintained in I readiness as of September 1,1999, and a safe condition are controlled by analog I describes NRC's determination of Y2K rather than digital systems and, consequently, readiness in operating U.S. NPPs. The staff are not affected by Y2K issues.
assessment of Y2K readiness consisted of independently evaluating NPP licensee Y2K Since 1996, the NRC has been working with readiness program processes, reviewing NPP licensees to ensure that NPP systems are I licensee responses to NRC requests for Y2K ready before year 2000. To ensure that reporting Y2K readiness, and combining the licensees of operating U.S. NPPs were aware results on these assessments to achieve of the Y2K issue, the NRC issued assurance that each NPP will operate safely Information Notice (IN) 96-70, " Year 2000 4 during the transition from 1999 to 2000 and Effect on Computer System Software," on on other Y2K-sensitive dates. December 24,1996. In IN 96-70, the staff described the potential problems that nuclear
- The Y2K computer problem pertains to the facility computer systems and software might potential for date-related problems that may encounter during the transition from 1999 to occur in a software system or an embedded 2000. l digital component. Among these problems are not representing the year accurately, not In 1997, the Nuclear Energy Institute (NEI) recognizing leap years, and erroneous date- took the lead in developing industry-wide based or time-based calculations. An guidance for addressing Y2K issues in the example of a date-related problem is nuclear power industry and, with cooperation interpreting "00" as the year 1900 rather than from the Nuclear Utility Software 2000, which could cause some computer Management Group (NUSMG), issued systems to malfunction. NEI/NUSMG 97-07, " Nuclear Utility Year 2000 Readiness." Subsequently, to address In NPP safety systems and plant operations contingency planning,NEI and NUSMG systems that use software systems or issued NEI/NUSMG 98-07, " Nuclear Utility embedded components, the Y2K problem Year 2000 Readiness Contingency Planning."
could cause an event that could lead to an In Generic Letter (GL) 98-01 and its NPP shutdown, or could affect systems that supplement," Year 2000 Readiness of either report post-shutdown plant status or Computer Systems at Nuclear Power Plants,"
that support emergency data collection the NRC accepted the guidance presented in ,
capabilities. Additionally, to the extent that a NEI/NUSMG 97-07 as an appropriate Y2K deficiency could cause an NPP methodology for addressing Y2K readiness shutdown or transient, the resulting loss of in NPPs. The staff also determined that the j electrical generation could introduce an guidance presented in NEI/NUSMG 98-07 i electrical distribution grid instability and a was appropriate for developing (1) system resulting loss of offsite power. Y2K issues Y2K contingency plans, (2) contingency also have the potential to affect plant support plans for internal facility risks, (3) vii NUREG-1706
contingency plans for external risks, and (4) The NRC issued GL 98-01, Supplement 1, m integrated Y2K contingency plans. January 1999. Supplement I has a broader scope than the original GL 98-01. The In GL 98-01, the NRC asked all holders of supplemental request for information, which operating licenses for NPPs to tell the NRC was voluntary and also due by July 1,1999, about steps they were taking to ensure that expanded the scope of the reporting computer systems will function properly as requirements to include systems that are not 1999 advances to 2000. Alllicensees addressed by the plart license and NRC responded to GL 98-01, stating that an NRC- regulations for safe operations and safe accepted program (NEIiNUSMG 97-07) had shutdowns, but are necessary for continued been adopted, the program addressed both plant operations.
safety-related and non-safety-related systems and components, and the plants would be In March 1999, the NRC expanded its scope Y2K ready by 2000. GL 98-01 also required of Y2K readiness program reviews to cover the licensees to confirm that their plants all operating NPP sites. These reviews, would be Y2K ready, including contingency which addressed the Y2K readiness programs planning, no later than July 1,1999. at all 103 NPPs, were completed by June 30, Licensees not Y2K ready by July 1,1999, 1999. The staff evaluated its reviews and were required to submit a status report scheduled followup reviews for selected containing completion schedules for work plants that were not far enough along in their remaining to be done to confirrri their plants Y2K readiness preparations at the time of the would be Y2K ready by 2000. first NRC staff review.
Beginning in mid-1998, the NRC audited 12 During May and June 1999, the staff also Y2K programs at different NPP sites, which conducted six detailed audits oflicensee involved 42 of the 103 operating NPPs. The contingency planning activities. In these staff did not discover any Y2K issues that audits, the stafTreviewed approximately 15 to would prevent the audited licensees from 20 licensee system and component achieving Y2K readiness. The information contingency plans, contingency plans for obtained during these audits and from other intemal facility risks, contingency plans for
. licensees and industry groups indicated that extemal risks, and the integrated contingency there are no significant Y2K problems in plan (typically, in the 103 NPP reviews, the those NPP systems that affect the ability to staff reviewed 6 contingency plans for safely operate and shut down NPPs. software or components). The acceptance However, licensees have discovered Y2K criteria for these audits were the same as the problems in such non-safety-related acceptance criteria used in the 103 NPP computer-based systems as security. reviews (NEI/NUSMG 97-07, " Nuclear computers, control room display systems, - Utility Year 2000 Readiness," and engineering software, control systems, NEI/NUSMG 98-07, " Nuclear Utility Year radiation monitoring systems, emergency 2000 Readiness Contingency Planning").
response systems, and communications The information obtained during these systems. reviews and audits confirmed that the Y2K readiness programs used for the 103 NPPs NUREG-1706 viii
are consistent with industry guidance. NPPs that are not scheduled to be Y2K ready l on the corresponding date, and whose non-By July 1,1999, licensees for all 103 systems could only affect administrative l operating NPPs reported the status of their functions at the plant.
Y2K readiness to the NRC. Regarding !
NRC's highest priority - the uninterrupted The NRC issued a preliminary report on NPP performance of NPP safety systems - all Y2K readiness on July 19,1999. That report J licensees reported that Y2K readiness efforts integrated the initial findings of NRC staff are completed, and that no remaining Y2K- reviews oflicensee Y2K readiness programs !
related problems exist that could affect the at all 103 NPPs with the licensee responses to i' performance of safety systems or the GL 98-01, Supplement 1. Most of the NRC capability for safely shutting down an NPP. onsite reviews oflicensee Y2K programs at l l
Licensees for 68 of these plants had also the 103 NPPs presented sufficient completed the next higher order of Y2K information for the staff to conclude licensee readiness as of July 1,1999, stating that all of Y2K readiness programs were consistent their computer systems that support plant with staff-acceptable industry guidance. j operations are Y2K ready. Licensees for the However, the staff could not complete i remaining 35 plants reported that, to be fully reviews oflicensee programs for 14 NPPs 1 Y2K ready, additional work would be because these licensees had not finished some completed on a few non-safety-related phase of Y2K readiness preparation by the systems or components that support plant date of the staff's review. The staff operations and administrative functions. conducted followup reviews of these Typically, the remaining work to be licensees by August 13,1999. The staff completed has been scheduled for outages in found that in the one case of Cooper Nuclear the fall, or upon delivery of replacement Station (CNS), the licensee had not components. completed its integrated contingency plan (ICP) by July 1,1999 (CNS safety-related The status of NPP Y2K readiness, including systems are Y2K ready), although CNS had the NPPs that are Y2K ready, is shown in the been previously listed as Y2K ready. The figure. The solid gray regions of the chart staff has added this licensee to its list of represent the number of NPPs that are already licensees to be tracked through completion of Y2K ready or are scheduled to be Y2K ready their Y2K readiness program.
on the corresponding date. The diagonally striped regions of the chart represent the Additionally, during a planned audit ofits number of NPPs that are not scheduled to be NPP Y2K inventory, the licensee for CNS Y2K ready on the corresponding date, and discovered three components that were that have systems to be remediated that could improperly addressed by its contractor. One affect power operations. (Remediation is component was in an operational support defined in NEl/NUSMG 98-07 as the process system and had been incorrectly classified as of retiring, replacing, or modifying software Y2K compliant when it was actually Y2K or devices that have been determined to be ready. The other two components were affected by the Y2K problem.) The white measu ement and test equipment regions of the chart represent the number of (administrative support systems). None of ix NUREG-1706
these components involved systems needed systems, (2) licensees for all 103 NPPs are to safely shut down the plant. The licensee is following NRC-acceptable industry guidance performing additional audits ofits NPP Y2K for achieving Y2K readiness,(3) 75 NPPs are inventory, and is developing a plan of action, Y2K ready, (4) 28 NPPs are not Y2K ready, which the NRC will monitor, and (5) the completion schedules for the few remaining non-safety-related items that The NRC also reviewed Y2K readiness remain not Y2K ready will be finished before activities at the 21 decommissioned U.S. the transition from 1999 to 2000. The NRC NPPs. The staff concluded that licensees of staff will verify completion oflicensee the decommissioned NPPs will be Y2K ready readiness activities as they are finished.
by the end of 1999. A detailed discussion of the results of these reviews is outside the The NRC believes that licensees will be able scope of this status report. to operate all 103 NPPs safely during the transition from 1999 to 2000, and does not As of September 1,1999, the staff concludes anticipate the need to direct any significant the following: (1) there are no Y2K concerns plant-specific regulatory actions.
that could affect the performance of safety Nuclear Power Plant Y2K Readiness
[ Administrative Systems 160 - M operational support systems
- dY 140 -
3 120 - All safety-related systems Y2K ready g
g
% 100 -
R R R l [- J
,g 80 - ;
f 60 - g 40 -
20 -
I i 1 i l l I l 7/1/99 8/1/99 9/1/99 10/1/99 11/1/99 12/1/99 12/16/99
)
i NUREG-1706 x 1
I l l
- ACKNOWLEDGMENTS Many NRC staff helped develop the guidance people made significant contributions to this used for reviewing licensee Y2K programs, report. Many other NRC staff were generous helped with the initial reviews and followup with their experience and guidance; and reviews oflicensee Y2K programs, and without them this report could not have been helped prepare this report. The following prepared.
Division of Engineering Office of Nuclear Reactor Regulation S. V. Athavale M. C. Gareri J. L. Afauck )
A. L. Bryant N. H. King-Wertman W. K. Afortensen l J. A. Calvo B. S. Afarcus J. R. Strosnider, Jr.
Af. Chiramal E. C. Afarinos R. H. Wessman J. A. Crutchley Other NRC Advisory Staff B. A. Calure T. G. Hiltz Af. C. Nolan A.G.Hans n G. R. Klingler D. V. Pickett E. A. Hayar: F. J. Miraglia, Jr. R. F. Sanders NRC Region I Support R. A. Blough D. C. Cullison L. Af. Harrison W. A. Cook L. A. Dudes T. R. Hipschman R. S. Barkley J. G. England R. J. Summers C. C. Cahill A. L. Della Greca NRC Region II Support D. E. Billings G. J. AlcCoy S. B. Rudisail F. Jape N. Alerriweather C. F. Smith K. D. Landis C. W. Rapp R. D. Telson i xi NUREG-1706
NRC Reglen III Support J. T. Adams S. J. Campbell J. D. Maynen C. E. Brown J. A. Clark D. G. Passehl B. L Burgess M. A. Kunowski P. F. Prescott S. C. Burton J.Lara R. A. Westberg D. S. Butler R. M. Lerch NRC Region IV Support D. G. Acker N. P. Garrett D. G. Passehl P. J. Alter A. T. Gody, Jr. C. F. O'Keefe R. V. Azua G. L. Guerra, Jr. C. J. Paulk, Jr.
K E. Brockman J. G. Kramer S. C. Schwind F. L. Brush C. S. Marschall K. D. Weaver T. R. Farnholtz M. H. Miller L. M. Willoughby V. Gaddy J. H. Moorman, til L. A. Yandell NUREG-1706 xii l
ABBREVIATIONS ARERAS atmospheric radioactive effluent release assessment system BIOS basic input output system CNS Cooper Nuclear Station ERDS emergency response data system ERFCS emergency response facility monitoring and trending computer system FDAS fire detection and alann system GENE General Electric Nuclear Energy GL generic letter ICP integrated contingency plan ICS integrated computer system IN Information Notice MAS main annunciator system MIDAS meteorological information and dispersion system NEI Nuclear Energy Institute NPP Nuclear Power Plant NRC Nuclear. Regulatory Commission NUSMG Nuclear Utility Software Management Group PBAPS Peach Bottom Atomic Power Station RMS radiation monitoring system SECY Letter from NRC staff to Commission SPDS . safety parameter display system SRM staff requirements memorandum TI temporary instruction Y2K Year 2000 xiii NUREG-1706
r i
1 INTRODUCTION I
l This report presents the status of Year 2000 The staffincorporated these two sources of l l ('Y2K) activities at the 103 operating U.S. information regarding Y2K readiness into )
- l. nuclear power plants (NPPs) as of . this report. Followup activities and the l September 1,1999. The status was scheduled completion dates for the NPPs not
! determined by integrating the results of NRC yet declared to be fully Y2K ready are also L staff reviews oflicensee responses to Generic presented here.
' Letter (GL) 98-01, Supplement 1, " Year 2000 Readiness of Computer Systems at Nuclear In Section 2, " Background," the staff Power Plants," with the findings of regional summarizes the nature of the Y2K problem, j staff reviews conducted at each NPP site. the history of NRC activities related to resolution of this problem in the nuclear The regulatory framework regarding issues power industry, and the scope of activities such as enforcement policy and NRC conducted by the staff to verify that plants contingency actions to support the transition will be Y2K ready before the end of 1999. In -
from 1999 to 2000 will be addressed in a Section 3, " Review and Integration J supplement to this report. Approach," the staff describes the methodology it used to perform onsite NRC regional stafTconducted reviews of reviews oflicensee Y2K activities for each of licensee Y2K activities at each NPP site the 103 NPPs and the methodology it used to :
following the guidance of Temporary integrate the results of these reviews with the )
Instruction (TI) 2515/141, " Review of Year licensee responses to GL 98-01, l l 2000 (Y2K) Readiness of Computer Systems ' _ Supplement 1. In Section 4, " Review at Nuclear Power Plants." NRC staff reviews Results," the staff summarizes the findings of verified that licensees were implementing its reviews oflicensee Y2K program j Y2K programs and processes consistent with activities and the licensee responses to the industry guidance in NEI/NUSMG 97-07, GL 98-01, Supplement 1, and lists the
" Nuclear Utility Year 2000 Readiness," and scheduled completion dates for the plants not NEI/NUSMG 98-07, " Nuclear Utility Year yet declared Y2K ready. In Section 5, 2000 Readiness Contingency Planning," " Future Activities," the staff describes the both of which have been found acceptable by activities it will perform in the months the staff. Additionally, the NRC received between September '1999 and March 2000, responses to GL 98-01, Supplement 1, from In Section 6, " Conclusions," the staff presents licensees of all 103 operating NPPs. its conclusions about Y2K readiness in U.S.
NPPs.
I 1 NUREG-1706 l
i 1
2 BACKGROUND ,
The Y2K computer problem pertains to the regulatory activities is presented in Figure 1.
. potential for date-related problems that may Since 1996, the NRC has been working with arise in a software system or an embedded NPP licensees to ensure that NPP systems are
' digital component. ' Among these problems Y2K ready before 2000. To ensure that are not representing the year properly, not licensees of operating U.S. NPPs were aware recognizing leap years, and erroneous date- of the Y2K issue, the NRC issued based or time-based calculations. An Information Notice (IN) 96-70, " Year 2000 example of a date-related problem is reading Effect on Computer System Software," on "00" as the year 1900 rather than 2000, which December 24,1996. In IN 96-70, the staff could cause some computer systems to described the potential problems that nuclear malfunction. A soRware system or an facility computer systems and soRware might embedded digital component that is encounter during the transition from 1999 to determined to be "Y2K compliant" accurately 2000. The NRC sent copies of this processes date and time data (including information notice to all U.S. NPP licensees, calculating, comparing, and sequencing data) fuel cycle facility licensees, and nuclear from, into, and between the years 1999 and materials licensees.
2000. A software system or an embedded digital component that is determined to be In 1997, the Nuclear Energy Institute (NEI)
"Y2K ready" performs its functions correctly, took the lead in developing industry-wide although the system or component is not guidance for addressing Y2K issues in the Y2K compliant. nuclear power industry and, with cooperation from the Nuclear Utility Sonware In NPP safety systems and phnt operations M.nagement Group (NUSMG), issued ,
systems that use soRware systems or NEI/NUSMG 97-07. Subsequently,in l embedded digital components, the Y2K August 1998, NEI and NUSMG issued l problem could cause an event that could lead NEI/NUSMG 98-07. In GL 98-01 and its
- to an NPP shutdown, or could affect systems supplement, the NRC accepted the guidance that either report post-shutdown plant status presented in NEI/NUSMG 97-07 as or that support emergency data collection appropriate methodologies for addressing capabilities.. Additionally, to the extent that a Y2K readiness in NPPs. )
Y2K deficiency could cause an NPP shutdown or transient, the resulting loss of In GL 98-01, the NRC requested that all electrical generation could introduce an holders of operating licenses for NPPs inform electrical distribution grid instability and a the NRC of steps they were taking to ensure resulting loss of offsite power. Y2K issues - that computer systems will function properly can also affect plant support or administrative by 2000. Every licensee respor.ded to systems. Most NPP safety systems are GL 98-01, stating that an NRC-accepted controlled by analog systems and, program (NEI/NUSMG 97-07) had been consequently, are not affected by Y2K issues. adopted, the program addressed both safety-related and non-safety-related systems and A timeline of significant NRC Y2K components, and the plants would be Y2K 3 NUREG-1706
l ready by 2000. GL 98-01 also required the all 103 operating NPPs. These reviews, licensees to confirm that their plants would addressing the Y2K programs for 103 NPPs, be Y2K ready, including contingency were completed by June 30,1999. As planning, no later than July 1,1999. described in Section 4, the staff evaluated the Licensees that were not Y2K ready by July 1, reviews and conducted followup reviews for 1999, were required to submit a status report selected plants that had not sufficiently containing completion schedules for work completed Y2K readiness preparations at the remaining to be done, to confirm their plants time of the site reviews.
would be Y2K ready by 2000.
During May and June 1999, the staff also Beginning in September 1998, the NRC conducted six detailed audits oflicensee audited 12 Y2K programs at different NPP contingency planning activities. In these sites, which involved 42 of 103 operating audits, the staff reviewed approximately 15 to NPPs. The staff did not discover any Y2K 20 licensee system and component issues that would keep the audited licensees contingency plans, contingency plans for from achieving Y2K readiness. The internal facility risks, contingency plans for information obtained during these audits and extemal risks, and the integrated contingency from other licensees and industry groups plan (typically, in the reviews, the staff indicated that, in those NPP systems, reviewed six contingency plans for software significant Y2K problems do not exist that or components). The acceptance criteria for affect the ability.to safely operate and shut these audits were the same as the acceptance down NPPs. However, licensees have criteria used in the 103 NPP reviews discovered Y2K problems in non-safety- (NEI/NUSMG 97-07, Nuclear Utility Year related computer-based systems, such as 2000 Readiness," and NEI/NUSMG 98-07, security computers, control room display " Nuclear Utility Year 2000 Readiness systems, engineering software, control Contingency Planning").
systems, radiation monitoring systems, emergency response systems, and Additionally, during May 1999, the NRC communications systems. staff developed an interim enforcement policy in SECY 99-135, " Interim The NRC issued Supplement I to GL 98-01 Enforcement Policy Regarding Enforcement in January 1999. The scope of this Discretion for Nuclear Power Plants During supplement was broader than the scope of the the. Year 2000 Transition." The Commission original GL 98-01. The supplemental request reviev,ed the interim enforcement policy, and for information, which was voluntary and presented guidance for its implementation in also due by July 1,1999. expanded the scope a staff requirements memorandum (SRM) of the reporting requirements to include dated July 8,1999, " Staff Requirements -
systems that are not addressed by the plant SECY 99-135 -Interim Enforcement Policy license and NRC regulations but are Regarding Enforcement Discretion for necessary for continued pfant operations. Nuclear Power Plants During the Year 2000 Transition." This interim policy is discussed in March 1999, the NRC expanded its scope in Section 5.
of Y2K readiness program reviews to cover NUREG-1706 4
On June 22,1999, in SECY-99-162, " Policy programs. Between September 1999 and for Regulatory Actions for Licensees of December 1999, the staff will continue to Nuclear Power Plants That Have Not review the remaining licensee Y2K activities Completed Year 2000 Readiness Activities," as they are completed. These activities are the NRC staff proposed a policy for discussed in Section 5.
regulatory actions it would take for licensees of nuclear power plants that had not The staff also addressed decommissioned completed their Y2K readiness activities NPPs and concluded that the licensees of the (including remediation and contingency 21 decommissioning nuclear power plants are planning) by July 1,1999. This policy is also implementing Y2K activities that address discussed in Section 5. equipment and systems important to safety, so that there is reasonable assurance of By July 1,1999, the staff had received adequate protection to public health and responses to GL 98-01, Supplement 1, from safety. A complete discussion of the status of licensees of all 103 operating NPPs. As the inspection activities for decommissioned . ;
. described in Section 4, the staff reviewed plants is outside the scope of this report. The l these responses and integrated the findings of sections that follow address Y2K readiness in !
these reviews with the findings of the staff's the 103 U.S. operating NPPs.
onsite reviews oflicensee Y2K readiness 5 NUREG-1706
l l
1996 May 1998 men mum . IN 96-70, " Year 2000 Effect on Computer System Software"
- NEl/NUSMG 97-07, " Nuclear Utility Year 2000 Readiness"
- Work with nuclear industry May 1998 oma suma e GL 98-01, " Year 2000 Readiness of Computer Systems at Nuclear Power Plants" June - July 1998 mussum
- NRC Y2K audit plan August 1998 muu um
- NE!/NUSMG 98-07, " Nuclear Utility Year 2000 Readiness Contingency Planning"
- First licensee responses to GL 98-01 September 1998 mum muni e Audits of 12 licensee Y2K readiness programs started January 1999 mum mamu o Audits of 12 licensee Y2K readiness programs completed a GL 98-01, Supplement i March 1999 == mum . Temporary Instruction (TI) 2515/141, " Review of Year 2000 (Y2K)
- Readiness of Computer Systems at Nuclear Power Plants" April 1999 men mum
- Staff Training for TI 2515/141
- Y2K readiness reviews of all 103 operating NPPs started
- IN 99-12. " Year 2000 Computer Systems Readiness Audits" May 1999 mums ums
- Audits of six licensee Y2K contingency plans started
- SECY 99135, " Interim Enforcement Policy Regarding Enforcement Discretion for Nuclear Power Plants During the Year 2000 Transition" June 1999 se num
- Y2K readiness reviews of all 103 operating NPPs completed
- Audits of six licensee Y2K contingency plans completed
- SECY-99-162," Policy for Regulatory Actions for Licensees of Nuclear
- Power Plants That llave Not Completed Year 2000 Readiness Activities" July 1999 mums mum . Licensee responses to GL 98-01, Supplement i e Preliminary report on NPP Y2K readiness
- Followup reviews of Y2K readiness at 14 NPPs started
- SRM for SECY 99-135 August 1999 === num a SRM for SECY 99162
- Follow-up reviews of Y2K readiness at 14 NPPs completed September 1999 muun mum
- NUREG-1706," Year 2000 Readiness in U.S. Nuc!ent Power Plants"
- NRC decision on need to order plant-specific Y2K actions
- Reviews of Y2K activities at NPPs October - December 1999 mum num
- NRC and industry Y2K exercise
- Reviews of Y2K activities at NPPs
- NRC Y2K contingency plan for December 31,1999, to January 1,2000 January 2000 === m-
- Y2K status report February March 2000 men mum a NRC Y2K contingency plan for February 28 to March I,2000 Figure 1. NRC Activities Related to NPP Y2K Readiness l
l NUREG-1706 6 l
l
l l
3 REVIEW ANDINTEGRATION APPROACH This section describes the methodology used Planning and Initial Assessment ,
by the NRC staff to conduct Y2K reviews at
- Management Planning each of the103 operating NPP sites, and to e Documentation integrate the review findings with the
- Implementation Plans licensee responses to GL 98-01, . Initial Assessment Supplement 1.
Detailed Assessment 3.1 Site Review Methodology
- System / Component Detailed Assessment The NRC reviews at each NPP site focused
- System / Component Remediation )
. on the process followed by the licensees to e System / Component Testing and l achieve Y2K readiness to ensure these Validation processes were consistent with the guidance
- System / Component Notification presented in NEI/NUSMG 97-07 and NEI/NUSMG 98-07. The staffoffered- Contingency Planning review guidance in Temporary Instruction
- System / Component Contingency (TI) 2515/141, " Review of Year 2000 (Y2K) Planning Readiness of Computer Systems at Nuclear
- Contingency Planning for Internal Power Plants." This Tl is available on the Facility Risks NRC web site <http://www.nrc.nov>. The TI e Contingency Planning for Extemal guidance contained 452 acceptance criteria Risks that were based on guidance presented in
- Integrated Contingency Planning NEI/NUSMG 97-07 and NEI/NUSMG l
98-07. To guide the staff reviewers, the To review detailed assessment activities, the review criteria in the TI were arranged in a staff selected one system or a component ;
checklist fomtat. The staff selected this from each of the following six plant system !
format to ensure that the reviews would be classes:
comprehensive and conducted consistently at
- Reactor Protection System and l each NPP site. Additional guidance for Engineered Safety Features System applying the acceptance criteria was (including emergency diesel j presented to NRC reviewers in training generators) sessions and in telephone calls between the .* Feedwater System and Balance of reviewers and NRC headquarters staff. Plant Systems
- Radiation Monitoring Systems The acceptance criteria were divided into e Emergency Notification Systems
~
three major areas of Y2K readiness activities:
- Plant Process Computer Systems
. (1) planning and initial assessment, (2)
- Plant Security Systems detailed assessment, and (3) contingency planning. These three major areas are further These six classes of plant systems were subdivided into more t,pecific areas of chosen to ensure that the NRC staff could acceptance criteria as follows: review any system or component during the 7 NUREG-1706
plant onsite reviews, thereby allowing the In the first step, the NRC staff reviewed .Y2K staff to assess the full scope of each licensee's readiness programs and implementation Y2K readiness program. Remediation is progress at each of the 103 operating NPPs.
' defined in NEI/NUSMG 98-07 as the process Because of the timing of the onsite reviews, of retiring, replacing, or modifying software the staff expected to find instances of or devices that have been determined to be incomplete Y2K readiness. Each review affected by the Y2K problem. involved discussions with the licensee's Y2K technical staff and reviews oflicensee The staff used the findings to determine the documents and work practices.
- adequacy of each licensee's Y2K readiness program with regard to consistency with To ensure consistency in the reviews, the industry guidelines. Upon receint of the staff developed acceptance criteria in the licensee's response to GL 98-01, Supplement form of a 452-question checklist, which is 1, the staff used its assessment of the described in Section 3.1. NRC staff licensee's program to gain assurance about reviewers completed these checklists and the quality of the licensee's Y2K readiness forwarded them to the headquarters staff for activities. This integration process is evaluation and integration with the licensee summarized next. responses to GL 98-01, Supplement 1.
3.2 Integration Process In the second step, NRC staff reviewed licensee responses to GL 98-01, The staff followed a three-step process to Supplement 1. In these responses, licensees
. attain assurance oflicensee Y2K readiness. noted the expected completion date of their The first step involved onsite reviews of Y2K readiness program and,if the licensee Y2K readiness activities using the completion date extended beyond July 1, acceptance criteria checklist described in . 1999, their schedule for completing Y2K Section 3.1. The second step involved a readiness activities.
review oflicensee responses to GL 98-01, Supplement 1, which were received by In the third step, the NRC staff reviewed the July 1,1999. The final step involved acceptance criteria checklists prepared by the integrating the findings of these first two NRC staff reviewers and integrated the steps to determine licensee Y2K readiness results of these reviews with the licensee and the need for regulatory followup actions. responses to GL 98-01. The results of this The integration process of the third step is integration process appear in the next section.
discussed in Section 4.
l NUREG-1706 8
4 REVIEW RESULTS This section summarizes the staff's reviews NPPs, only detailed assessment activities at of all 103 operating NPPs, and integrates the two NPPs, and only contiagency planning review findings with the licensee responses to activities at four NPPs. The staff performed GL-98-01, Supplement 1. followup reviews at the following NPPs:
4.1 Assessment of NPP Licensee Y2K + Arkansas Nuclear One, Units 1 and 2 Programs
- Beaver Valley Power Station, Units 1 and 2 )
As described in Section 3.1, the staff . Cooper Nuclear Station !
reviewed licensee Y2K program . Grand Gulf Nuclear Station, Unit 1 implementations at all 103 operating NPP e Indian Point, Unit 2 sites between April 1999 and July 1999. In
- Prairie Island Nuclear Generatmg some cases, the staff performed reviews Plant, Units I and 2 before the licensees had completed all phases
- River Bend Station, Unit 1 l of their Y2K programs. For example, many . Three Mile Island Nuclear Station, licensees had not planned to complete Unit 1 integrated contingency planning activities
- Vermont Yankee Nuclear Power until late June 1999, but the staff reviewed Station their Y2K program implementation in May or
- Virgil C. Summer Nuclear Station, early June. Consequently, these licensees UnitI could not provide the staff with sufficient
- Waterford Steam Electric Station, information at the time of the initial review Unit 3 for the staff to conclude that the licensee's integrated contingency planning process was In 13 of the 14 reviews, the staff was able to consistent with industry guidance. conclude that the licensee programs were consistent with industry guidance.
The staff found that of the 103 operating NPPs 14 required additional followup In reviewing the integrated contingency reviews to evaluate more fully each phase of planning activities at Cooper Nuclear Station the licensee's Y2K program. The staff (CNS), the staff determined that the conducted followup reviews between July I licensee's integrated contingency plan (ICP) and August 13,1999, and addressed only was not sufficiently complete to conclude those portions of the applicable TI 2515/141 that CNS was fully Y2K ready, although all acceptance criteria that the staff could not safety-related systems and components were evaluate during the its initial review, or that Y2K ready. The licensee presented a date of required additional clarification regarding the September 20,1999, for completing the ICP.
, manner ofimplementing certain Y2K The staff will review the CNS ICP upon its activities. Specifically, the staff reviewed completion.
detailed assessment activities and contingency planning activities at eight Additionally, during a planned audit ofits l NPP Y2K inventory, the licensee for CNS 9 NUREG-1706
i discovered that three items had not been concluded that all heensees were adequately assessed. The first item was a implementing Y2K programs that were radiation monitor that was incorrectly consistent with the NRC-approved industry classified as Y2K compliant, but was only guidance.
Y2K ready and still performed its operational function. The second item was a device used Using the information gained from the staff for testing batteries and had been classified as . assessments oflicensee Y2K programs not Y2K compliant; however, the
~
(including the TI 2515/141 followup reviews replacement component was also not Y2K described above), the staff reviewed the compliant, although the battery tester was licensee responses to GL 98-01, Supplement 1 Y2K ready. The third item was a device used 1, to find areas requiring additional staff !
for testing that was omitted from the followup actions and reviews. The results of. i licensee's Y2K database. This device was this assessment are described in the next not included in their inventory database section.
because it is only used as a backup calibration device in case other calibration 4.2 Review of Licensee Responses to :
devices fail. None of these components GL 98-01, Supplement 1 involved systems needed to safely shut down the plant, and did not change the licensee's The licensee responses to GL 98-01, Y2K status, as previously reported to the Supplement 1, indicated that all NPP safety- i NRC. The licensee is performing additional related systems are Y2K ready. Safety-audits ofits NPP Y2K inventory, and is related systems are those systems required for developing a plan of action, which the NRC shutting down a plant and maintaining the will monitor. plant in a safe shutdown state. -l NEI provides guidance to the industry for The licensee responses also indicated that, as l ongoing maintenance of Y2K readiness. The of July 1,1999, licensees for 35 of the 103 L staffis working with NEl to address operating NPPs had additional work to i situations where a licensee or vendor complete on a few non-safety-related 1
- discovers that a system or embedded digital operational support and administrative ,
component that was thought to be Y2K ready support systems or devices to be fully Y2K J is found to have a Y2K deficiency. The staff ready. The licensees submitted schedule L and industry are considering configuration completion dates for these systems and l- management issues regarding systems and components. Typically, the remaining work j l embedded digital components so that the staff has been scheduled for outages in the fall, or '
can gain confidence that the industry is upon delivery of replacement components.
- confirming through ongoing processes that - I unexpected Y2K' problems are addressed and Operational support systems are non-safety )
that generic information is shared in a timely related systems that support electrical power manner. .
generation. For example, a feedwater control system is a non-safety-related system that On the basis of the results of the completed supports power generation. Some of these reviews for all 103 operating NPPs, the staff systems may be required to be operable as a l
'NUREG-1706 10 l i
1-- . .
condition of the plant license or as a result of remains nearly constant during July and a regulatory commitment, but are not relied August, decreasmg from 28 systems on July upon to maintain the plant in a safe condition. 1,1999, to 21 systems on September 1,1999.
Between September I and November 1, Administrative support systems are non- 1999, the number of operational support safety-related systems that support systems that are scheduled to be Y2K ready administrative functions at the plant. For decreases by 16 systems. Of the remaining example, a meteorological system that five systems on November 1,1999, four produces plant environmental information, systems are scheduled to become Y2K ready and a system for tracking personnel radiation during November 1999 (three systems in exposures are administrative support systems. Salem Nuclear generating Station, Unit 1:
These systems are non-safety-related and and one system in Comanche Peak Steam generally are used to facilitate activities such Electric Station, Unit 1). The remaining as recording personnel activities and system is the Joseph M. Farley Nuclear Plant, qualifications, maintaining equipment Unit 2, digital electrohydraulic controller, inventory records, and archiving records of which is discussed in Section 4.2.2.
plant operations.
As shown in Figure 2, the number of 4.2.1 NPP System Y2K Readiness administrative support systems that are scheduled to be remediated decreases from For plants that are not Y2K ready, the total 32 systems on July 1,1999, to 16 systems on number of operational support systems and October 1,1999. The remaining 16 systems administrative support systems that have not are scheduled to be remediated during been remediated are shown in Figure 2. In October 1999. This trend reflects licensee this figure, the number of operational support activities being scheduled for fall outages and systems that are scheduled to become Y2K software upgrade schedules.
ready are shown in the diagonally striped regions on the chart. The number of 4.2.2 NPP Y2K Readiness administrative support systems that are scheduled to become Y2K ready are shown in The number of NPPs expected to be Y2K the white regions on the chart. ready as a function of date are shown in Figure 3. The gray regions of the chart Included in the operational support systems is represent the number of NPPs that are already the CNS ICP that the staff determined during Y2K ready or are scheduled to be Y2K ready a follow-up review was not completed by on the corresponding date. The diagonally July 1,1999 (see discussion about CNS in striped regions of the chart represent the Section 4.1). The staff, therefore, added this number of NPPs that are not scheduled to be licensee to the staff's list oflicensees to be Y2K ready on the corresponding date and tracked through completion of their Y2K have operational support systems to be readiness program. remediated. The white regions of the chart represent the number of NPPs that are not The number of operational support systems scheduled to be Y2K ready on the that are scheduled to become Y2K ready corresponding date, and that have only 11 NUREG-1706
administrative support systems to be remediated, licensee will install a Y2K-ready turbine )
digital electrohydraulic controller on the I main turbine. The licensee does not plan to NPPs that have both operational support restart from the outage until this modification systems and administrative support systems is completed. This system has been installed to be remediated are counted with the NPPs and operated at Joseph M. Farley Nuclear that have only operational support systems to Plant, Unit 1. Additionally, the licensee has be remediated. As the remediation activities prepared contingency plans and will have a on the operational support systems with both manufacturer representative on site during types of systems are finished, these NPPs are critical Y2K rollover periods. Consistent reclassified as NPPs with only administrative with the pattern of Y2K remediation support systems. These changes are shown activities indicated in Figure 3, most of the on Figure 3 as increases in the number of remediation activities will be performed in l
NPPs that have only administrative support the fall of 1999 during NPP outages.
systems to be remediated.
Table I lists each NPP, the associated As shown in Figure 3, the number of plants licensee, and either the Y2K readiness status
)
not Y2K ready remains relatively constant or the licensee's expected date for becoming during the summer months, when peak Y2K ready. As shown in this table, as of electrical loads on the electrical distribution September 1,1999, licensees of 75 NPPs grids are typically highest. Because of the have reported they are Y2K ready. More high demands for electrical power during the specific details regarding the remaining 28 summer months, licensees usually schedule NPPs appear in Table 2.
NPP refueling outages for the fall. Between July 1 and October 1,1999, the number of Table 2 lists the NPPs that licensees reported NPPs scheduled to become Y2K ready were not Y2K ready; a brief description of increases by 15 NPPs from the July 1,1999, each system not Y2K ready, potential value of 68 NPPs to the October 1,1999, consequences and licensee actions if the Y2K )
value of 83 NPPs. During October 1999, vulnerability were to remain uncorrected and (
another 17 NPPs are scheduled to becorne the system was to fail because of a Y2K-Y2K ready. Two of the remaining three related failure; and the licensee's scheduled NPPs that will not be Y2K ready at the end of date for finishing remediation of each system.
October 1999 are scheduled to become Y2K None of the remaining Y2K readiness work ready in November 1999: Comanche Peak in the NPPs affects the ability of a plant to ,
Steam Electric Station, Unit 1, and Salem shut down safely, if necessary. As noted in j Nuclear Generating Station, Unit 1. Figures 2 and 3, all safety-related systems in j the 103 NPPs are Y2K ready.
The last NPP (Joseph M. Farley Nuclear Plant, Unit 2) is scheduled to become Y2K For NPP licensees that have not finished their ready by December 16,1999. This NPP will Y2K activities, the staff will monitor licensee be in an outage between October 16 and actions and verify the completion of Y2K December 16,1999. During this outage, the activities as described in Section 5. l NUREG-1706 12
35 -
S $ Operational Support Systems 30 -
] Administrative Support Systems a 25 - All safety-related systems Y2K ready g 20 -
t 8 p l5 -
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5- ,
0- i - i -i i j l i 7/1/99 8/1/99 9/1/99 10/1/99 11/1/99 12/1/99 12/16/99 Figure 2. Systems and Components Remaining to be Remediated O Administrative Systems
@ Operational Support Systems 140 - E Y2K Ready
,,120 -
All safety-related systems Y2K ready Fil fGl
,h100 - l l i i i i i 7/1/99 8/1/99 9/1/99 10/1/99 11/1/99 12/1/99 12/16/99 Figure 3. Stattos of NPP Y2K Readiness 13 NUREG-1706
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5 FUTURE ACTIVITIES In May 1999, the NRC staff developed an readiness activities (including remediation interim enforcement policy in SECY 99-135, and contingency planning) by July 1,1999.
" Interim Enforcement Policy Regarding The proposed policy addused NRC Enforcement Discretion for Nuclear Power commitments to Congress that the agency Plants During the Year 2000 Transition." In would assess licensees' Y2K preparedness SECY-99-135, the staff sought the and determine the need for p! ant-specific Commission's approval to revise the NRC regulatory action, up to and including the enforcement policy for NPPs to add an issuance of shutdown orders. The proposed interim policy to exercise enforcement policy supplemented NRC Y2K contingency discretion for noncompliance with license plans and the NRC's policy on enforcement conditions, including technical specifications, discretion for Y2K-related issues, which was during theY2K transition or rollover periods. described in SECY-99-135.
The Commission reviewed the interim enforcement policy, and presented guidance The Commission approved the proposed for its implementation in a staff requirements policy with supplemental guidance in an memorandum (SRM) dated July 8,1999, SRM dated August 5,1999," Staff
" Staff Requirements - SECY 99-135 Requirements - SECY-99-162 -Policy for
-Interim Enforcement Policy Regarding Regulatory Actions for Licensees of Nuclear Enforcement Discretion for Nuclear Power Power Plants That Have Not Completed Year Plants During the Year 2000 Transition." 2000 Readiness Activities." The guidance The NRC published the interim enforcement required that the staff take regulatory actions, policy in the Federal Register in July 1999. where appropriate, sufficiently in advance of The staf fis implementing procedures for this the Y2K rollover date (i.e., as soon as policy and is assigning appropriate staff as September 30,1999, but no later than part of the NRC's contingency planning December 1,1999) to ensure that plants are effort. in a safe, stable state during the Y2K transition. Additionally, the staff will The staff continues to monitor licensee provide current and projected completion progress, and will verify the Y2K readiness dates far Y2K readiness, of each system and embedded digital component as they are finished. The staff The staff will continue to monitor licensee will discuss these verification activities in schedules reported in their GL 98-01 inspection reports, responses and will detemline whether additional actions are required. On the basis On June 22,1999, in SECY-99-162, " Policy of current licensee schedules for finishing for Regulatory Actions for Licensees of Y2K activities, the staff does not anticipate Nuclear Power Plants That Have Not directing plant-specific actions.
Completed Year 2000 Readiness Activities,"
the NRC staff proposed a policy for Additionally, the staff will maintain a web regulaiory actions it would take for licensees site, <htto://www.nrc.cov> , to keep the of NPPs that had not completed their Y2K public abreast of all activities related to NPP 15 NUREG-1706 ,
4 h
Y2K readiness. The web site will include the The NRC will implement the contingency staff's assessment of each site that is not fully plan and augment the staffin the NRC Y2K ready. The NRC will also issue press Emergency Response Center during the releases conceming NPP Y2K readiness at critical date rollovers on December 31,1999, appropriate intervals. to January 1,2000; and February 28 to March 1,2000.
In October 1999, to validate NRC and industry contingency plans, the NRC and The staff will prepare a final Y2K status iridustry will conduct a Y2K exercise that report in January 2000. This status report simulates various failures during the will summarize the activities performed by transition from 1999 to 2000. The NRC staff the staff and industry between September 1, will incorporate lessons learned from this 1999, and January 1,2000.
exercise into its Y2K contingency plan.
l l
NUREG-1706 16 l
n 6 CONCLUSIONS As of September 1,1999, the staff concludes before the transition from 1999 to 2000. The (1) no Y2K concerns remain that could affect NRC staff will verify completion oflicensee the performance of safety systems, (2) readiness activities as they are completed.
licensees for all 103 NPPs are following NRC-acceptable industry guidance for The NRC believes that licensees will be able achieving Y2K readiness, (3) 75 NPPs are to operate all 103 NPPs safely during the Y2K ready, (4) 28 NPPs are not Y2K ready, transition from 1999 to 2000, and does not and (5) the completion schedules for the anticipate the need to direct any significant remaining few non-safety-related items that plant-specific actions.
are still not Y2K ready will be accomplished i
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QNiW 11o2.
- and Addendum Numbers,if any.)
am 2o2 BIBLIOGRAPHIC DATA SHEET l (See matrucbons on be reverse)
- 2. TITLE AND SucTITLE NUREG-1706 l Yo9 2000 Readiness in U.S. Nuclear Power Plants l
- 3. DATE REPORT PuBUSHED Septe_mber . _ ,1999 4 FIN OR GRANT NUMBER 5 /.uTHOR(S) 8 TYPE OF REPORT Michael E. Waterman, Deirdre W. Spaulding l Teid
- 7. PERIOo COVERED (incAueve Deres) l l
Jan.1996 - March 2000 8 PERFORMING ORGANIZATION NAME AND ADDRESS (if NRC, prowde Dwson, onico or Regen. U S Nucsear Reputatory comtrasson. sad madng address. # contractor. l prowde name and mahng address) l l
Division of Engineering Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 9 SPONSORING ORGANIZATION NAME AND ADDRESS (frNRC, type 'Same as acow' # contractor, prowde NRC Dwman. Onice or Regen. U S Nucesor Regutafory commesson.
and medag address J S me as above
- 10. SUPPLEMENTARY NOTES
- 11. ABSTRACT (200 nords or Jess)
This report describes the results of NRC staff reviews of licensee nuclear power plant (NPP) year 2000 (Y2K) readiness tctivities conducted at each nuclear power plant. The results of the staff reviews are integrated with the July 1,1999,iicensee r;sponses to Generic Letter (GL) 98-01, Supplement 1," Year 2000 Readiness of Computer Systems at Nuclear Power PI nts," and licensee follow-up reports of Y2K readiness. Alllicensees of NPPs reported in response to GL 98-01, Supplement 1, that there are no Y2K-related problems that directly affect the performance of safety systems. The Nuclear Regulatory Cnmmission has confirmed by onsite reviews that at all 103 U.S. nuclear power plants there are no Y2K-related problems vtnich affect the performance of safety systems needed to safely shut down the plants. As of September 1,1999, the staff concludes that licensees of 75 of the 103 plants have completed all activities to ensure computer systems and digital Embedded components that support plant operations are "Y2K ready. Licensees for 28 plants have additional work to complete on a few non-safety systems or components that support plant operations and administrative functions. Thes e licensees provided scheduled completion dates for their plants. Typically, the licensee is completing the remainingY2K work efter July 1,1999, because the work requires a plant outage scheduled for the fall of 1999 or because the licantae i* waiting for delivery of a replacement component. Alllicensees are expected to be Y2K ready by December 16,1G9.
- 12. KEY WORDS/DESCRIPTORS (Ust nords or poram mat mis samst iesearchers in ecaong the roport) 13 AvAiLAeldTY STATEMENT Year 2000 unlimited Y2K u securunetAssmAm Y2K readiness trNs e.ge; Y2K Read / unclassified Y2K Compliant Nuclear power plant (758 "'8 'O Contingency Plan unclassified Contingency Planning 15 NUMBER OF PAGES 16 PRICE NRC FofW 336 (249) The Ibrm was seectrorucany produred by Elite Federsi Forms Inc
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