Nuclear Standards for Polymeric
Piping
Aaron Forster, NIST
Engineering Laboratory
NIST, MS 8615
100 Bureau Drive
Gaithersburg, MD 20899
(301) 975-8701
Email: aaron.forster@nist.gov
NESCC HDPE Status:
• PPTG report released in January 2013
• Held a workshop on February 28, 2013 to discuss merger of NESCC and ASME
HDPE Roadmaps
• Continue to Formalize Roadmap with communication between ASME and NRC
• Held meeting at NRC on March 14, 2013 to discuss input on short term
priorities.
• Planning 2nd workshop for April 18, 2013 to further progress in creating a “Joint
HDPE Roadmap” plan
ASME Roadmap Implementation
Issues
1
• Capturing Issues
from Regulators and
industry
• Prioritization of
Issues/concerns with
input from NRC,
DOE, SDOs and
industry
• Confirm Regulatory
acceptance of
priorities
Planning
Resolutions
Standards
Development
Endorsement
2
3
4
5
• Identify projects: utilize • Solicit Contracts
ASME’s HDPE
with R&D Entities
Roadmap, NESCC’s
report & other sources • Oversee R&D
Projects
• Develop project scope
• Review Results
• Establish tasks,
schedule & budgets
• Share Final
Findings and
• Identify target code
Outcome with
case or standard
Committees/NRC
• Identify funding
• Coordinate with other
SDO’s, & government
entities.
• Obtain regulatory buyin on the plan forward
• Confirm regulatory
agreement of
Issue Resolution
• Standards
development and
writing
• Revise or create
Technical
Concerns, Code
Cases or
Standards
• Consensus process
• Adoption to the
Code
• NRC participation in
first 4 phases lead
to standards
endorsement
• Obtain NRC
endorsement of
new or modified
code cases or
standards
HDPE Roadmap Workshop
EPRI Headquarters
February 28, 2013
Attendees:
•
DOE, NRC, ASME, ASTM, EPRI, NIST
Objective:
Coordinate the NESCC and ASME “Joint Roadmap” efforts. Let’s work from one template.
Identify potential short and long term R&D projects, deliverables, and standards impacts.
Prioritize projects
Identify current efforts on R&D, both confirmatory and new research
Deliverables:
Consensus Roadmap with basic prioritization
Develop an understanding of current efforts and future research efforts required
Methodology to track progress at ASME
Methodology to prioritize projects and sub-tasks
Strategy for Stakeholder engagement (Future Meeting)
Move away from a numbered list to an actionable plan….
1
2
2a
2b
2c
2d
2e
2f
2g
3
4
5
6
6a
6b
6c
6d
7
8
9
10
Need or Concern
Thin wall vs. thick wall and thermal gradients
Fusion Joints
Validated and standardized fusion joint test for short
and long term performance
Butt fusion standardization and qualification
Electrofusion standardization and qualification
Essential variables for fusion of all materials
Qualification procedure personnel and equipment
Long term performance of fusion joints (SCG resistance)
Performance based fusion procedure, performance,
equipment
Expanded standards for fittings and design
Allowable stress for service temperature up to 140 F
Determination of allowable surface flaw up to 10% of wall
thickness
Long term performance
Creep behavior at elevated temperature and transient
temperature and pressure
Fracture mechanics qualification for crack growth
Substantiation of linearity of HDB curve at 140 F
Incorporation of chemical degradation into standards
Pipe hangers and supports
Seismic design
Fire Resistance
Visual and volumetric testing qualifications and
requirements
Identified Need?
NRC
ASME
NRC
NRC
NRC
NRC
NRC
NRC
ASME
ASME
ASME
ASME
ASME
ASME
NESCC
NESCC
NESCC
NESCC
NESCC
NESCC
NRC
NRC
ASME
ASME
ASME
NESCC
NESCC
NESCC
NRC
ASME
NESCC
NRC
ASME
ASME
ASME
ASME
NRC
NRC
NRC
ASME
ASME
NESCC
NESCC
NESCC
NESCC
NESCC
ASME
NESCC
1. NESCC 10-013 – HDPE use by Catawba Nuclear Station, Steve Lefler, Duke Energy
2. NRC Issues Regarding the use of HDPE piping in safety-related nuclear applications, Use of HDPE for Power Plant Piping Systems Workshop, June
7-10, 2010 North Carolina
3. STP-NU-YYY ASME Code Development Roadmap for HDPE Service Pipe in Nuclear Service, under revision
4. NESCC Polymeric Pipe Task Group Report, 2012, balloted for draft
Prioritization:
•
Prioritize according to Code Deliverables:
i. Short term (under 3 years)
1. Specify as “A” priority
2. conditioned code case: N755 (Section III) and 808 (Section XI)
3. currently working to finalize these priorities. Hard deadline is April
18, 2013.
ii. Med term (under 5 years)
1. Specify as “B” priority
2. Collecting identified research gaps. Negatives resolved to go from
conditionally accepted to fully accepted.
iii. Long term (under 10 years)
1. Accept conditions and details into ASME code
a. N755 (Section III) and 808 (Section XI)
2. Fully accepted code case with no conditions
Interconnecting Roadmap
Short Term (Conditioned CC)
Medium Term (Unconditioned CC)
Methodology to Commonize Roadmaps:
•
Basic level:
 Do they have the same information
•
Answering the questions:
 What are all the issues?
 Why these issue are critical?
 What needs to be done for conditional endorsement and then for full
endorsement?
 Priorities within a group?
 What issues have been resolved, what activities under way including
research and what research still needs to be done?
 Project timing for new activities and research?.
Methodology to Track Progress:
•
•
•
Go through 1 line of the ASME tracking spreadsheet
Go through 1 topic of the research plans
Need to switch to Excel during presentation
Concerns:
•
Main concerns (personal view):
•
•
•
•
•
Acceptance of this path forward in ASME volunteer community
Developing a champion within the community of stakeholders
Stewardship of roadmap
Fostering communication between the stakeholders and regulators
Funding those tasks that require more than code writing in the
short term
Stakeholders Meeting
Objective:
•Educate the economic and operational case for HDPE code acceptance,
•Demonstrate the current regulatory and engineering challenges for HDPE usage that have limited deployment,
•Identify impact of conditional approval on market development,
•Present effort to manage existing ASME and NESCC R&D priorities into one Roadmap to support short and long term design,
implementation, and regulatory goals,
•Gain feedback from relevant industries regarding implementation and support of this process
•Attendees: Utility Operators, Plant Design and Construction, Plastic Pipe producers, NRC, ASME