PSC Y1ME

Overview

The Product Service Code (PSC) system is a governmentwide taxonomy used to classify the goods and services procured by Federal agencies for reporting and analysis in systems such as FPDS and SAM; the PSC Manual on Acquisition.gov maintains definitions and procedures for PSC assignment and change control. ¹

The PSC Y1ME is listed in the PSC Manual as "Construction of EPG Facilities - Nuclear" and is used to identify contract actions where the primary work is construction related to electric power generation (EPG) facilities that use nuclear energy. The PSC Manual lists Y1ME among other EPG construction service codes but provides only the short descriptor without an expanded technical scope. ²

• See also on G2X:
  • Y1ME — PSC Y1ME overview
  • Y1MA — Construction of EPG Facilities - Coal
  • C1ME — Architect and Engineering- Construction: EPG Facilities - Nuclear

What this PSC covers

• Construction of EPG facilities using nuclear energy (core descriptor). ²
• Construction activities for reactor and containment buildings — Not specified by official sources ¹
• Site preparation and heavy civil work for nuclear generation projects — Not specified by official sources ¹
• Installation or integration of nuclear-specific mechanical/electrical systems — Not specified by official sources ¹
• Associated utility and plant support facility construction for nuclear EPG — Not specified by official sources ¹

Related NAICS and PSC codes

(Selection limited to codes explicitly listed near Y1ME in the official PSC Manual.)

Type	Code	Descriptor
PSC	Y1MA	Construction of EPG Facilities - Coal
PSC	Y1MB	Construction of EPG Facilities - Gas
PSC	Y1MD	Construction of EPG Facilities - Hydro

Selection guidance

PSC selection should reflect the predominant product or service on the contract/action as reported in FPDS; when construction of a nuclear EPG facility is the primary work, code the action to Y1ME. Agencies are instructed in the PSC Manual to select the PSC that best represents the predominant purchase and to use FPDS data element guidance when multiple products/services are present. ¹

Frequently asked questions

• Q: What does PSC Y1ME specifically denote?
  A: PSC Y1ME denotes "Construction of EPG Facilities - Nuclear" as the official short descriptor in the PSC Manual; the manual provides the short listing but no expanded technical scope beyond that descriptor. ²

• Q: When should an award be coded to Y1ME in FPDS?
  A: An award should be coded to Y1ME when the predominant work reported in the contract action is construction of a nuclear electric power generation facility, consistent with FPDS data element guidance to select the predominant product or service. ¹

• Q: Is there a separate PSC for architect/engineering work on nuclear EPG facilities?
  A: Yes. The PSC C1ME is listed as "Architect and Engineering- Construction: EPG Facilities - Nuclear" for A/E construction services; agencies should use the code that matches the primary contractual effort. ²

• Q: Which NAICS codes map to Y1ME?
  A: The PSC Manual lists Y1ME as a service code but does not publish a definitive NAICS crosswalk for this PSC in the printed descriptor pages; NAICS mapping is handled in PSC alignment spreadsheets and FPDS crosswalks. Not specified by official sources. ¹

Useful resources

• Y1ME on G2X
• Product and Service Code Manual — landing page on Acquisition.gov ¹
• Product and Service Code Manual (PDF, PSC Manual, April 2025) ²
• FPDS help / FAQ (FPDS reporting guidance and user support) ³

References

1. Acquisition.gov — Product and Service Code Manual (landing page): https://www.acquisition.gov/psc-manual
2. Acquisition.gov — Product and Service Code Manual PDF (PSC Manual, April 2025): https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
3. FPDS — Frequently Asked Questions / Help: https://www.fpds.gov/help/faq.htm